Test structure density instead (Why is this check normally also teste…

…d against ON_BORDER?)

code/modules/mob/living/carbon/xenomorph/abilities/general_powers.dm

@@ -45,10 +45,10 @@
 		to_chat(xeno, SPAN_WARNING("These weeds are too strong to plant a node on!"))
 		return
 
-	var/obj/structure/window_frame/window = locate() in turf
-	if(window && window.density)
-		to_chat(xeno, SPAN_WARNING("You can't do that here."))
-		return
+	for(var/obj/structure/struct in turf)
+		if(struct.density && !(struct.flags_atom & ON_BORDER)) // Not sure exactly if we need to test against ON_BORDER though
+			to_chat(xeno, SPAN_WARNING("You can't do that here."))
+			return
 
 	var/area/area = get_area(turf)
 	if(isnull(area) || !(area.is_resin_allowed))