GB Audio: Fix APU re-enable timing glitch

CHANGES

@@ -22,6 +22,7 @@ Emulation fixes:
  - GB Audio: Fix channel 1/2 reseting edge cases (fixes mgba.io/i/1925)
  - GB Audio: Properly apply per-model audio differences
  - GB Audio: Revamp channel rendering
+ - GB Audio: Fix APU re-enable timing glitch
  - GB Memory: Add cursory cartridge open bus emulation (fixes mgba.io/i/2032)
  - GB Serialize: Fix loading MBC1 states that affect bank 0 (fixes mgba.io/i/2402)
  - GB Video: Draw SGB border pieces that overlap GB graphics (fixes mgba.io/i/1339)

cinema/gb/blargg/cgb_sound/07-len sweep period sync/config.ini

@@ -1,2 +0,0 @@
-[testinfo]
-fail=1

cinema/gb/blargg/cgb_sound/08-len ctr during power/config.ini

@@ -1,2 +0,0 @@
-[testinfo]
-fail=1

cinema/gb/blargg/dmg_sound/07-len sweep period sync/config.ini

@@ -1,2 +0,0 @@
-[testinfo]
-fail=1

cinema/gb/blargg/dmg_sound/08-len ctr during power/config.ini

@@ -1,2 +0,0 @@
-[testinfo]
-fail=1

src/gb/audio.c

@@ -451,7 +451,7 @@ void GBAudioWriteNR52(struct GBAudio* audio, uint8_t value) {
 		audio->skipFrame = false;
 		audio->frame = 7;
 
-		if (audio->p && audio->p->timer.internalDiv & 0x400) {
+		if (audio->p && audio->p->timer.internalDiv & (0x100 << audio->p->doubleSpeed)) {
 			audio->skipFrame = true;
 		}
 	}