Commented-out code to print buffer before each lookup

To be turned into a useful HB_DEBUG_SHAPE infrastructure...

src/hb-ot-layout.cc

@@ -1010,6 +1010,18 @@ inline void hb_ot_map_t::apply (const Proxy &proxy,
     const stage_map_t *stage = &stages[table_index][stage_index];
     for (; i < stage->last_lookup; i++)
     {
+#if 0
+      char buf[4096];
+      hb_buffer_serialize_glyphs (buffer, 0, buffer->len,
+				  buf, sizeof (buf), NULL,
+				  font,
+				  HB_BUFFER_SERIALIZE_FORMAT_TEXT,
+				  Proxy::table_index == 0 ?
+				  HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS :
+				  HB_BUFFER_SERIALIZE_FLAG_DEFAULT);
+      printf ("buf: [%s]\n", buf);
+#endif
+
       unsigned int lookup_index = lookups[table_index][i].index;
       c.set_lookup_index (lookup_index);
       c.set_lookup_mask (lookups[table_index][i].mask);