[kerx] Use hb_bit_set_t instead of hb_set_t

src/hb-aat-layout-common.hh

@@ -67,8 +67,8 @@ struct hb_aat_apply_context_t :
   const OT::GDEF *gdef_table;
   const hb_sorted_vector_t<hb_aat_map_t::range_flags_t> *range_flags = nullptr;
   hb_bit_set_t buffer_glyph_set;
-  const hb_set_t *left_set = nullptr;
-  const hb_set_t *right_set = nullptr;
+  const hb_bit_set_t *left_set = nullptr;
+  const hb_bit_set_t *right_set = nullptr;
   const hb_bit_set_t *machine_glyph_set = nullptr;
   hb_aat_class_cache_t *machine_class_cache = nullptr;
   hb_mask_t subtable_flags = 0;

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

@@ -919,7 +919,7 @@ struct KerxSubTable
  * The 'kerx' Table
  */
 
-using kern_accelerator_data_t = hb_vector_t<hb_pair_t<hb_set_t, hb_set_t>>;
+using kern_accelerator_data_t = hb_vector_t<hb_pair_t<hb_bit_set_t, hb_bit_set_t>>;
 
 template <typename T>
 struct KerxTable
@@ -1104,7 +1104,7 @@ struct KerxTable
     unsigned int count = thiz()->tableCount;
     for (unsigned int i = 0; i < count; i++)
     {
-      hb_set_t left_set, right_set;
+      hb_bit_set_t left_set, right_set;
       st->collect_glyphs (left_set, right_set, num_glyphs);
       accel_data.push (hb_pair (left_set, right_set));
       st = &StructAfter<SubTable> (*st);