fix build

src/hb-ot-var-hvar-table.hh

diff --git a/src/hb-ot-var-hvar-table.hh b/src/hb-ot-var-hvar-table.hh
index 8e8343b..e3f5909 100644
--- a/src/hb-ot-var-hvar-table.hh
+++ b/src/hb-ot-var-hvar-table.hh
@@ -159,7 +159,7 @@
 
     unsigned int	last_val = (unsigned int)-1;
     hb_codepoint_t	last_gid = (hb_codepoint_t)-1;
-    hb_codepoint_t	gid = MIN((hb_codepoint_t)index_map.get_map_count (), plan->num_output_glyphs ());
+    hb_codepoint_t	gid = (hb_codepoint_t)MIN(index_map.get_map_count (), plan->num_output_glyphs ());
 
     outer_bit_count = (index_map.get_width () * 8) - index_map.get_inner_bit_count ();
     max_inners.resize (inner_remaps.length);