Bodybag Stairs Fix (#19199)

Fixes bodybags being affected by "Stairs are dangerous". They should
realistically be able to be dragged with minimal issues.

code/game/objects/items/bodybag.dm

@@ -142,6 +142,9 @@
 /obj/structure/closet/body_bag/animate_door()
 	flick("[initial(icon_state)]_anim_[opened ? "open" : "close"]", src)
 
+/obj/structure/closet/body_bag/stair_act() //Stops body bags flying open when pulled down stairs
+	return
+
 /obj/item/bodybag/cryobag
 	name = "stasis bag"
 	desc = "A folded, reusable bag designed to prevent additional damage to an occupant, especially useful if short on time or in \