[myanmar] Fold D category into GB

Trying to free a byte the buffer vars, for caching of lookups.

Part of https://github.com/harfbuzz/harfbuzz/issues/3633

src/hb-ot-shaper-myanmar-machine.hh

@@ -44,14 +44,14 @@ enum myanmar_syllable_type_t {
 #define myanmar_syllable_machine_ex_As 18u
 #define myanmar_syllable_machine_ex_C 1u
 #define myanmar_syllable_machine_ex_CS 19u
-#define myanmar_syllable_machine_ex_D 32u
+#define myanmar_syllable_machine_ex_D 11u
 #define myanmar_syllable_machine_ex_D0 20u
 #define myanmar_syllable_machine_ex_DB 3u
 #define myanmar_syllable_machine_ex_GB 11u
 #define myanmar_syllable_machine_ex_H 4u
 #define myanmar_syllable_machine_ex_IV 2u
 #define myanmar_syllable_machine_ex_MH 21u
-#define myanmar_syllable_machine_ex_ML 33u
+#define myanmar_syllable_machine_ex_ML 32u
 #define myanmar_syllable_machine_ex_MR 22u
 #define myanmar_syllable_machine_ex_MW 23u
 #define myanmar_syllable_machine_ex_MY 24u

src/hb-ot-shaper-myanmar-machine.rl

@@ -48,14 +48,14 @@ enum myanmar_syllable_type_t {
 export A    = 10;
 export As   = 18;
 export C    = 1;
-export D    = 32;
+export D    = 11;
 export D0   = 20;
 export DB   = 3;
 export GB   = 11;
 export H    = 4;
 export IV   = 2;
 export MH   = 21;
-export ML   = 33;
+export ML   = 32;
 export MR   = 22;
 export MW   = 23;
 export MY   = 24;

src/hb-ot-shaper-myanmar.hh

@@ -55,8 +55,8 @@ enum myanmar_category_t {
   //OT_VPst = 29,
   OT_VS   = 30, /* Variation selectors */
   OT_P    = 31, /* Punctuation */
-  OT_D    = 32, /* Digits except zero */
-  OT_ML   = 33, /* Various consonant medial types */
+  OT_D    = OT_GB, /* Digits except zero */
+  OT_ML   = 32, /* Various consonant medial types */
 };
 
 using myanmar_position_t = indic_position_t;