Fix runtime due to processing hydrotray at loc=null

code/datums/supplypacks.dm

@@ -22,11 +22,9 @@ var/list/all_supply_groups = list("Operations","Security","Hospitality","Enginee
 
 /datum/supply_packs/New()
 	manifest += "<ul>"
-	for(var/path in contains)
+	for(var/atom/movable/path in contains)
 		if(!path)	continue
-		var/atom/movable/AM = new path()
-		manifest += "<li>[AM.name]</li>"
-		AM.loc = null	//just to make sure they're deleted by the garbage collector
+		manifest += "<li>[initial(path.name)]</li>"
 	manifest += "</ul>"
 
 /datum/supply_packs/specialops