stop upgrade spam on griders

code/game/objects/structures/girders.dm

@@ -15,6 +15,7 @@
 	var/datum/material/girder_material
 	var/datum/material/reinf_material
 	var/reinforcing = 0
+	var/upgrading = FALSE
 	var/applies_material_colour = 1
 	var/wall_type = /turf/simulated/wall
 
@@ -208,8 +209,13 @@
 			if(!reinforce_with_material(W, user))
 				return ..()
 		else
+			if(upgrading)
+				return
+			upgrading = TRUE
 			if(!construct_wall(W, user))
+				upgrading = FALSE
 				return ..()
+			upgrading = FALSE
 
 	else
 		return ..()
@@ -226,23 +232,23 @@
 	var/amount_to_use = reinf_material ? 1 : 2
 	if(S.get_amount() < amount_to_use)
 		to_chat(user, span_notice("There isn't enough material here to construct a wall."))
-		return 0
+		return FALSE
 
 	var/datum/material/M = name_to_material[S.default_type]
 	if(!istype(M))
-		return 0
+		return FALSE
 
 	var/wall_fake
 	add_hiddenprint(user)
 
 	if(M.integrity < 50)
 		to_chat(user, span_notice("This material is too soft for use in wall construction."))
-		return 0
+		return FALSE
 
 	to_chat(user, span_notice("You begin adding the plating..."))
 
 	if(!do_after(user,40) || !S.use(amount_to_use))
-		return 1 //once we've gotten this far don't call parent attackby()
+		return TRUE //once we've gotten this far don't call parent attackby()
 
 	if(anchored)
 		to_chat(user, span_notice("You added the plating!"))
@@ -258,7 +264,7 @@
 		T.can_open = 1
 	T.add_hiddenprint(user)
 	qdel(src)
-	return 1
+	return TRUE
 
 /obj/structure/girder/proc/reinforce_with_material(obj/item/stack/material/S, mob/user) //if the verb is removed this can be renamed.
 	if(reinf_material)