GBA BIOS: Fix BitUnPack final byte

CHANGES

@@ -38,6 +38,7 @@ Bugfixes:
  - Qt: Improve FPS timer stability
  - GBA Serialize: Fix loading channel 3 volume (fixes mgba.io/i/1107)
  - GBA SIO: Fix unconnected SIOCNT for multi mode (fixes mgba.io/i/1105)
+ - GBA BIOS: Fix BitUnPack final byte
 Misc:
  - GBA Timer: Use global cycles for timers
  - GBA: Extend oddly-sized ROMs to full address space (fixes mgba.io/i/722)

src/gba/bios.c

@@ -809,7 +809,7 @@ static void _unBitPack(struct GBA* gba) {
 	uint32_t out = 0;
 	int bitsRemaining = 0;
 	int bitsEaten = 0;
-	while (sourceLen > 0) {
+	while (sourceLen > 0 || bitsRemaining) {
 		if (!bitsRemaining) {
 			in = cpu->memory.load8(cpu, source, 0);
 			bitsRemaining = 8;