Merge pull request #9141 from deathride58/removwarpwissle

Actually fixes warp whistle runtimes

code/modules/antagonists/wizard/equipment/artefact.dm

@@ -405,8 +405,12 @@
 	var/breakout = 0
 	while(breakout < 50)
 		if(!T)
-			break
+			end_effect(user)
+			return
 		var/turf/potential_T = find_safe_turf()
+		if(!potential_T)
+			end_effect(user)
+			return
 		if(T.z != potential_T.z || abs(get_dist_euclidian(potential_T,T)) > 50 - breakout)
 			do_teleport(user, potential_T, channel = TELEPORT_CHANNEL_MAGIC)
 			user.canmove = 0