Minor, annotate the added tables with likely/unlikely (#997)

src/hb-aat-layout-feat-table.hh

diff --git a/src/hb-aat-layout-feat-table.hh b/src/hb-aat-layout-feat-table.hh
index e7329fe..3e070d7 100644
--- a/src/hb-aat-layout-feat-table.hh
+++ b/src/hb-aat-layout-feat-table.hh
@@ -42,7 +42,7 @@
   inline bool sanitize (hb_sanitize_context_t *c) const
   {
     TRACE_SANITIZE (this);
-    return_trace (c->check_struct (this));
+    return_trace (likely (c->check_struct (this)));
   }
 
   protected:
@@ -57,8 +57,8 @@
   inline bool sanitize (hb_sanitize_context_t *c, const void *base) const
   {
     TRACE_SANITIZE (this);
-    return_trace (c->check_struct (this) &&
-		  (base+settingTable).sanitize (c, nSettings));
+    return_trace (likely (c->check_struct (this) &&
+			  (base+settingTable).sanitize (c, nSettings)));
   }
 
   enum {
@@ -98,8 +98,8 @@
   inline bool sanitize (hb_sanitize_context_t *c) const
   {
     TRACE_SANITIZE (this);
-    return_trace (c->check_struct (this) &&
-		  names.sanitize (c, featureNameCount, this));
+    return_trace (likely (c->check_struct (this) &&
+			  names.sanitize (c, featureNameCount, this)));
   }
 
   protected: