[serialize] Remove unnecessary pointer indirection

diff --git a/src/hb-open-file.hh b/src/hb-open-file.hh
index c2d65eb..54947b4 100644
--- a/src/hb-open-file.hh
+++ b/src/hb-open-file.hh

@@ -126,7 +126,7 @@
   {
     TRACE_SERIALIZE (this);
     /* Alloc 12 for the OTHeader. */
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     /* Write sfntVersion (bytes 0..3). */
     sfnt_version = sfnt_tag;
     /* Take space for numTables, searchRange, entrySelector, RangeShift
@@ -496,7 +496,7 @@
   {
     TRACE_SERIALIZE (this);
     assert (sfnt_tag != TTCTag);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     return_trace (u.fontFace.serialize (c, sfnt_tag, items));
   }
 

diff --git a/src/hb-open-type.hh b/src/hb-open-type.hh
index fa6ccbd..49653ce 100644
--- a/src/hb-open-type.hh
+++ b/src/hb-open-type.hh

@@ -479,7 +479,7 @@
   bool serialize (hb_serialize_context_t *c, unsigned int items_len)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend (*this, items_len))) return_trace (false);
+    if (unlikely (!c->extend (this, items_len))) return_trace (false);
     return_trace (true);
   }
   template <typename Iterator,
@@ -652,9 +652,9 @@
   HB_NODISCARD bool serialize (hb_serialize_context_t *c, unsigned items_len)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     c->check_assign (len, items_len, HB_SERIALIZE_ERROR_ARRAY_OVERFLOW);
-    if (unlikely (!c->extend (*this))) return_trace (false);
+    if (unlikely (!c->extend (this))) return_trace (false);
     return_trace (true);
   }
   template <typename Iterator,
@@ -675,7 +675,7 @@
   {
     TRACE_SERIALIZE (this);
     len++;
-    if (unlikely (!len || !c->extend (*this)))
+    if (unlikely (!len || !c->extend (this)))
     {
       len--;
       return_trace (nullptr);
@@ -802,9 +802,9 @@
   bool serialize (hb_serialize_context_t *c, unsigned int items_len)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     c->check_assign (lenP1, items_len + 1, HB_SERIALIZE_ERROR_ARRAY_OVERFLOW);
-    if (unlikely (!c->extend (*this))) return_trace (false);
+    if (unlikely (!c->extend (this))) return_trace (false);
     return_trace (true);
   }
   template <typename Iterator,

diff --git a/src/hb-ot-cff-common.hh b/src/hb-ot-cff-common.hh
index 864a27f..eaaf5e1 100644
--- a/src/hb-ot-cff-common.hh
+++ b/src/hb-ot-cff-common.hh

@@ -126,7 +126,7 @@
     else
     {
       /* serialize CFFIndex header */
-      if (unlikely (!c->extend_min (*this))) return_trace (false);
+      if (unlikely (!c->extend_min (this))) return_trace (false);
       this->count = byteArray.length;
       this->offSize = offSize_;
       if (unlikely (!c->allocate_size<HBUINT8> (offSize_ * (byteArray.length + 1))))
@@ -214,7 +214,7 @@
     unsigned off_size = calcOffSize (total);
 
     /* serialize CFFIndex header */
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     this->count = it.len ();
     this->offSize = off_size;
     if (unlikely (!c->allocate_size<HBUINT8> (off_size * (it.len () + 1))))
@@ -335,7 +335,7 @@
   {
     TRACE_SERIALIZE (this);
     /* serialize CFFIndex header */
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     this->count = dataArrayLen;
     this->offSize = offSize_;
     if (unlikely (!c->allocate_size<HBUINT8> (offSize_ * (dataArrayLen + 1))))

diff --git a/src/hb-ot-cff1-table.hh b/src/hb-ot-cff1-table.hh
index 5903510..5dd183e 100644
--- a/src/hb-ot-cff1-table.hh
+++ b/src/hb-ot-cff1-table.hh

@@ -187,7 +187,7 @@
 		  const hb_vector_t<code_pair_t>& supp_codes)
   {
     TRACE_SERIALIZE (this);
-    Encoding *dest = c->extend_min (*this);
+    Encoding *dest = c->extend_min (this);
     if (unlikely (!dest)) return_trace (false);
     dest->format = format | ((supp_codes.length > 0) ? 0x80 : 0);
     switch (format) {
@@ -457,7 +457,7 @@
 		  const hb_vector_t<code_pair_t>& sid_ranges)
   {
     TRACE_SERIALIZE (this);
-    Charset *dest = c->extend_min (*this);
+    Charset *dest = c->extend_min (this);
     if (unlikely (!dest)) return_trace (false);
     dest->format = format;
     switch (format)

diff --git a/src/hb-ot-cmap-table.hh b/src/hb-ot-cmap-table.hh
index 2b03e1f..7c5d8d3 100644
--- a/src/hb-ot-cmap-table.hh
+++ b/src/hb-ot-cmap-table.hh

@@ -253,7 +253,7 @@
     if (format4_iter.len () == 0) return;
 
     unsigned table_initpos = c->length ();
-    if (unlikely (!c->extend_min (*this))) return;
+    if (unlikely (!c->extend_min (this))) return;
     this->format = 4;
 
     //serialize endCode[]
@@ -693,7 +693,7 @@
   {
     if (it.len () == 0) return;
     unsigned table_initpos = c->length ();
-    if (unlikely (!c->extend_min (*this))) return;
+    if (unlikely (!c->extend_min (this))) return;
 
     hb_codepoint_t startCharCode = 0xFFFF, endCharCode = 0xFFFF;
     hb_codepoint_t glyphID = 0;
@@ -1077,7 +1077,7 @@
     unsigned table_initpos = c->length ();
     const char* init_tail = c->tail;
 
-    if (unlikely (!c->extend_min (*this))) return;
+    if (unlikely (!c->extend_min (this))) return;
     this->format = 14;
 
     auto src_tbl = reinterpret_cast<const CmapSubtableFormat14*> (base);

diff --git a/src/hb-ot-color-sbix-table.hh b/src/hb-ot-color-sbix-table.hh
index af1e4a5..d2911f1 100644
--- a/src/hb-ot-color-sbix-table.hh
+++ b/src/hb-ot-color-sbix-table.hh

@@ -145,7 +145,7 @@
     auto* out = c->serializer->start_embed<SBIXStrike> ();
     if (unlikely (!out)) return_trace (false);
     auto snap = c->serializer->snapshot ();
-    if (unlikely (!c->serializer->extend (*out, num_output_glyphs + 1))) return_trace (false);
+    if (unlikely (!c->serializer->extend (out, num_output_glyphs + 1))) return_trace (false);
     out->ppem = ppem;
     out->resolution = resolution;
     HBUINT32 head;

diff --git a/src/hb-ot-hdmx-table.hh b/src/hb-ot-hdmx-table.hh
index 590fa15..dea2b7e 100644
--- a/src/hb-ot-hdmx-table.hh
+++ b/src/hb-ot-hdmx-table.hh

@@ -52,7 +52,7 @@
 
     unsigned length = it.len ();
 
-    if (unlikely (!c->extend (*this, length)))  return_trace (false);
+    if (unlikely (!c->extend (this, length)))  return_trace (false);
 
     this->pixelSize = pixelSize;
     this->maxWidth =

diff --git a/src/hb-ot-layout-common.hh b/src/hb-ot-layout-common.hh
index ee2b3c5..61dbd3f 100644
--- a/src/hb-ot-layout-common.hh
+++ b/src/hb-ot-layout-common.hh

@@ -1262,13 +1262,13 @@
 		  unsigned int num_subtables)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     lookupType = lookup_type;
     lookupFlag = lookup_props & 0xFFFFu;
     if (unlikely (!subTable.serialize (c, num_subtables))) return_trace (false);
     if (lookupFlag & LookupFlag::UseMarkFilteringSet)
     {
-      if (unlikely (!c->extend (*this))) return_trace (false);
+      if (unlikely (!c->extend (this))) return_trace (false);
       HBUINT16 &markFilteringSet = StructAfter<HBUINT16> (subTable);
       markFilteringSet = lookup_props >> 16;
     }
@@ -1478,7 +1478,7 @@
   bool serialize (hb_serialize_context_t *c, Iterator glyphs)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
 
     if (unlikely (!glyphs))
     {
@@ -1657,7 +1657,7 @@
   bool serialize (hb_serialize_context_t *c, Iterator glyphs)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
 
     unsigned count = 0;
     unsigned num_ranges = 0;
@@ -1890,7 +1890,7 @@
 		  Iterator it)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
 
     if (unlikely (!it))
     {
@@ -2069,7 +2069,7 @@
 		  Iterator it)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
 
     if (unlikely (!it))
     {
@@ -2311,7 +2311,7 @@
   bool serialize (hb_serialize_context_t *c, Iterator it_with_class_zero)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
 
     auto it = + it_with_class_zero | hb_filter (hb_second);
 
@@ -2522,7 +2522,7 @@
   bool serialize (hb_serialize_context_t *c, const VarRegionList *src, const hb_bimap_t &region_map)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     axisCount = src->axisCount;
     regionCount = region_map.get_population ();
     if (unlikely (hb_unsigned_mul_overflows (axisCount * regionCount,
@@ -2626,7 +2626,7 @@
 		  const hb_bimap_t &region_map)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     itemCount = inner_map.get_next_value ();
 
     /* Optimize short count */
@@ -2778,7 +2778,7 @@
 		  const hb_array_t <hb_inc_bimap_t> &inner_maps)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
 
     unsigned int set_count = 0;
     for (unsigned int i = 0; i < inner_maps.length; i++)

diff --git a/src/hb-ot-layout-gpos-table.hh b/src/hb-ot-layout-gpos-table.hh
index 0c0b6b4..b5981bd 100644
--- a/src/hb-ot-layout-gpos-table.hh
+++ b/src/hb-ot-layout-gpos-table.hh

@@ -805,7 +805,7 @@
 		  ValueFormat newFormat,
 		  const hb_map_t *layout_variation_idx_map)
   {
-    if (unlikely (!c->extend_min (*this))) return;
+    if (unlikely (!c->extend_min (this))) return;
     if (unlikely (!c->check_assign (valueFormat,
                                     newFormat,
                                     HB_SERIALIZE_ERROR_INT_OVERFLOW))) return;
@@ -925,7 +925,7 @@
 		  ValueFormat newFormat,
 		  const hb_map_t *layout_variation_idx_map)
   {
-    auto out = c->extend_min (*this);
+    auto out = c->extend_min (this);
     if (unlikely (!out)) return;
     if (unlikely (!c->check_assign (valueFormat, newFormat, HB_SERIALIZE_ERROR_INT_OVERFLOW))) return;
     if (unlikely (!c->check_assign (valueCount, it.len (), HB_SERIALIZE_ERROR_ARRAY_OVERFLOW))) return;

diff --git a/src/hb-ot-layout-gsub-table.hh b/src/hb-ot-layout-gsub-table.hh
index 3b84fc3..393ada1 100644
--- a/src/hb-ot-layout-gsub-table.hh
+++ b/src/hb-ot-layout-gsub-table.hh

@@ -100,7 +100,7 @@
 		  unsigned delta)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     if (unlikely (!coverage.serialize_serialize (c, glyphs))) return_trace (false);
     c->check_assign (deltaGlyphID, delta, HB_SERIALIZE_ERROR_INT_OVERFLOW);
     return_trace (true);
@@ -209,7 +209,7 @@
       + it
       | hb_map_retains_sorting (hb_first)
       ;
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     if (unlikely (!substitute.serialize (c, substitutes))) return_trace (false);
     if (unlikely (!coverage.serialize_serialize (c, glyphs))) return_trace (false);
     return_trace (true);
@@ -448,7 +448,7 @@
 		  hb_array_t<const HBGlyphID> substitute_glyphs_list)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     if (unlikely (!sequence.serialize (c, glyphs.length))) return_trace (false);
     for (unsigned int i = 0; i < glyphs.length; i++)
     {
@@ -691,7 +691,7 @@
 		  hb_array_t<const HBGlyphID> alternate_glyphs_list)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     if (unlikely (!alternateSet.serialize (c, glyphs.length))) return_trace (false);
     for (unsigned int i = 0; i < glyphs.length; i++)
     {
@@ -855,7 +855,7 @@
 		  Iterator components /* Starting from second */)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     ligGlyph = ligature;
     if (unlikely (!component.serialize (c, components))) return_trace (false);
     return_trace (true);
@@ -954,7 +954,7 @@
 		  hb_array_t<const HBGlyphID> &component_list /* Starting from second for each ligature */)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     if (unlikely (!ligature.serialize (c, ligatures.length))) return_trace (false);
     for (unsigned int i = 0; i < ligatures.length; i++)
     {
@@ -1066,7 +1066,7 @@
 		  hb_array_t<const HBGlyphID> component_list /* Starting from second for each ligature */)
   {
     TRACE_SERIALIZE (this);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
     if (unlikely (!ligatureSet.serialize (c, first_glyphs.length))) return_trace (false);
     for (unsigned int i = 0; i < first_glyphs.length; i++)
     {

diff --git a/src/hb-ot-var-hvar-table.hh b/src/hb-ot-var-hvar-table.hh
index 4d7f2ed..928fcc7 100644
--- a/src/hb-ot-var-hvar-table.hh
+++ b/src/hb-ot-var-hvar-table.hh

@@ -54,7 +54,7 @@
     TRACE_SERIALIZE (this);
     if (unlikely (output_map.length && ((((inner_bit_count-1)&~0xF)!=0) || (((width-1)&~0x3)!=0))))
       return_trace (false);
-    if (unlikely (!c->extend_min (*this))) return_trace (false);
+    if (unlikely (!c->extend_min (this))) return_trace (false);
 
     format = ((width-1)<<4)|(inner_bit_count-1);
     mapCount = output_map.length;