SCUMM: MI2 kill tune 113 on start of next, Fixes bug #1410 / Booty Is…

…land

Fix the "MI2: Two soundtracks playing at once" bug from the bug tracker.
It's triggered when the player enters the kiosk for the second time and
leaves before tune 113 is started.

engines/scumm/imuse/imuse.cpp

@@ -696,6 +696,23 @@ bool IMuseInternal::startSound_internal(int sound, int offset) {
 	if (_game_id == GID_MONKEY2 && (sound == 100) && (getSoundStatus_internal(107, true) == 1))
 		IMuseInternal::stopSound_internal(107);
 
+	// Workaround for monkey2 bug #1410 / Booty Island
+	//
+	// Tunes involved
+	// 100 - Captain Dread's map
+	// 113 - Guard Kiosk
+	// 115 - Map of Booty Island
+	// 118 - Ville de la Booty
+	//
+	// When you enter the Guard Kiosk tune 113 is added as trigger on song
+	// 115. Then if you leave, 113 is stopped and 115 is started again.
+	// If you leave quickly enough, the trigger occurs on the map and tune
+	// 113 will not stop.
+	// We kill 113 on entry of one of the other locations (Captain Dread
+	// or Ville de la Booty) because tune 115 is not always started.
+	if (_game_id == GID_MONKEY2 && (sound == 100 || sound == 118) && (getSoundStatus_internal(113, true) == 1))
+		IMuseInternal::stopSound_internal(113);
+
 	player->clear();
 	player->setOffsetNote(offset);
 	return player->startSound(sound, driver);