Fixes component cleanup

code/datums/datum.dm

@@ -22,10 +22,16 @@
 			continue
 		qdel(timer)
 	var/list/dc = datum_components
-	for(var/I in dc)
+	if(dc)
+		var/all_components = dc[/datum/component]
+		if(islist(all_components))
+			for(var/I in all_components)
 				var/datum/component/C = I
 				C._RemoveNoSignal()
 				qdel(C)
-	if(dc)
+		else
+			var/datum/component/C = all_components
+			C._RemoveNoSignal()
+			qdel(C)
 		dc.Cut()
 	return QDEL_HINT_QUEUE