Roll HarfBuzz to 1.1.1

third_party/harfbuzz-ng/src/hb-ot-shape-complex-thai.cc

Index: third_party/harfbuzz-ng/src/hb-ot-shape-complex-thai.cc
diff --git a/third_party/harfbuzz-ng/src/hb-ot-shape-complex-thai.cc b/third_party/harfbuzz-ng/src/hb-ot-shape-complex-thai.cc
index d4ede209f4b39a6248cd0ccda7417f9e7d690ff0..6556a325173ccc6df867347d60fb9c223878d3ea 100644
--- a/third_party/harfbuzz-ng/src/hb-ot-shape-complex-thai.cc
+++ b/third_party/harfbuzz-ng/src/hb-ot-shape-complex-thai.cc
@@ -139,7 +139,7 @@ thai_pua_shape (hb_codepoint_t u, thai_action_t action, hb_font_t *font)
   };
 
   switch (action) {
-    default: assert (false); /* Fallthrough */
+    default: assert (false); HB_FALLTHROUGH;
     case NOP: return u;
     case SD:  pua_mappings = SD_mappings; break;
     case SDL: pua_mappings = SDL_mappings; break;
@@ -315,7 +315,7 @@ preprocess_text_thai (const hb_ot_shape_plan_t *plan,
 
   buffer->clear_output ();
   unsigned int count = buffer->len;
-  for (buffer->idx = 0; buffer->idx < count;)
+  for (buffer->idx = 0; buffer->idx < count && !buffer->in_error;)
   {
     hb_codepoint_t u = buffer->cur().codepoint;
     if (likely (!IS_SARA_AM (u))) {
@@ -330,7 +330,7 @@ preprocess_text_thai (const hb_ot_shape_plan_t *plan,
     if (unlikely (buffer->in_error))
       return;
 
-    /* Make Nikhahit be recognized as a mark when zeroing widths. */
+    /* Make Nikhahit be recognized as a ccc=0 mark when zeroing widths. */
     unsigned int end = buffer->out_len;
     _hb_glyph_info_set_general_category (&buffer->out_info[end - 2], HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK);
 
@@ -372,6 +372,7 @@ const hb_ot_complex_shaper_t _hb_ot_complex_shaper_thai =
   NULL, /* data_create */
   NULL, /* data_destroy */
   preprocess_text_thai,
+  NULL, /* postprocess_glyphs */
   HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT,
   NULL, /* decompose */
   NULL, /* compose */