Merge pull request #6404 from Heroman3003/flappening

Makes airtight plastic flaps unmakeable

code/game/objects/structures/plasticflaps.dm

@@ -8,7 +8,7 @@
 	layer = MOB_LAYER
 	plane = MOB_PLANE
 	explosion_resistance = 5
-	var/can_pass_lying = 1
+	var/can_pass_lying = TRUE
 	var/list/mobs_can_pass = list(
 		/mob/living/bot,
 		/mob/living/simple_mob/slime/xenobio,
@@ -37,7 +37,7 @@
 	if (istype(A, /obj/structure/bed) && B.has_buckled_mobs())//if it's a bed/chair and someone is buckled, it will not pass
 		return 0
 
-	if(istype(A, /obj/vehicle)) //no vehicles
+	if(istype(A, /obj/vehicle) || istype (A, /obj/mecha)) //no vehicles
 		return 0
 
 	var/mob/living/M = A
@@ -66,4 +66,4 @@
 	name = "airtight plastic flaps"
 	desc = "Heavy duty, airtight, plastic flaps. Have extra safety installed, preventing passage of living beings."
 	can_atmos_pass = ATMOS_PASS_NO
-	can_pass_lying = 0
+	can_pass_lying = FALSE