.

code/modules/ventcrawl/ventcrawl.dm

@@ -66,11 +66,11 @@ var/list/ventcrawl_machinery = list(
 /mob/living/proc/is_allowed_vent_crawl_item(var/obj/carried_item)
 	//Ability master easy test for allowed (cheaper than istype)
 	if(carried_item == ability_master)
-		return 1
+		return TRUE
 	if(isanimal(src))
 		var/mob/living/simple_mob/S = src
-		if(carried_item == S.myid)	//VOREStation Edit
-			return 1	//VOREStation Edit
+		if(carried_item == S.myid)
+			return TRUE
 	//Try to find it in our allowed list (istype includes subtypes)
 	var/listed = FALSE
 	for(var/test_type in can_enter_vent_with)
@@ -80,23 +80,23 @@ var/list/ventcrawl_machinery = list(
 
 	//Only allow it if it's "IN" the mob, not equipped on/being held. //Disabled, as it's very annoying that, for example, Pun Pun has no way to ventcrawl with his suit if given the verb, since the list of allowed items is ignored for worn items.
 	if(listed/* && !get_inventory_slot(carried_item)*/)
-		return 1
+		return TRUE
 
 /mob/living/carbon/is_allowed_vent_crawl_item(var/obj/item/carried_item)
 	if(carried_item in internal_organs)
-		return 1
+		return TRUE
 	return ..()
 
 /mob/living/carbon/human/is_allowed_vent_crawl_item(var/obj/item/carried_item)
 	if(carried_item in organs)
-		return 1
+		return TRUE
 	if(species.name == SPECIES_REPLICANT_CREW)
 		if(istype(carried_item, /obj/item/clothing/under))
-			return 1 //Allow them to not vent crawl naked
+			return TRUE //Allow them to not vent crawl naked
 		if(istype(carried_item, /obj/item))
 			var/obj/item/I = carried_item
-			if(I.w_class <= 2)
-				return 1 //Allow them to carry items that fit in pockets
+			if(I.w_class <= ITEMSIZE_SMALL)
+				return TRUE //Allow them to carry items that fit in pockets
 	return ..()
 
 /mob/living/proc/ventcrawl_carry()
@@ -129,7 +129,7 @@ var/list/ventcrawl_machinery = list(
 		return pipe
 
 /mob/living/carbon/alien/ventcrawl_carry()
-	return 1
+	return TRUE
 
 /mob/living/var/ventcrawl_layer = 3