Fix: Siren sound now not playing after shuttle been recalled.

If you called shuttle and then recalled it, you had to listen to the siren anyway, every 90 seconds till the round end.

code/datums/shuttle_controller.dm

@@ -95,7 +95,7 @@ datum/shuttle_controller
 			var/timeleft = timeleft()
 			if(timeleft > 1e5)		// midnight rollover protection
 				timeleft = 0
-			if (sound_siren)	//playing siren every 90 seconds
+			if (sound_siren && (direction == 1))	//playing siren every 90 seconds
 				sound_siren = 0
 				world << sound('siren.ogg')
 				spawn(900)