Add TRACKS_ALL, remove BGCntrlBitfield

include/gba/m4a_internal.h

@@ -313,6 +313,8 @@ struct MusicPlayerTrack
 
 #define MAX_MUSICPLAYER_TRACKS 16
 
+#define TRACKS_ALL 0xFFFF
+
 #define TEMPORARY_FADE  0x0001
 #define FADE_IN         0x0002
 #define FADE_VOL_MAX    64

include/gba/types.h

@@ -35,7 +35,7 @@ struct BgCnt
 {
     u16 priority:2;
     u16 charBaseBlock:2;
-    u16 dummy:2;
+    u16 dsCharBaseBlock:2;
     u16 mosaic:1;
     u16 palettes:1;
     u16 screenBaseBlock:5;