changes

code/game/area/areas.dm

@@ -26,6 +26,8 @@
 	var/clockwork_warp_fail = "The structure there is too dense for warping to pierce. (This is normal in high-security areas.)"
 	/// Persistent debris alowed
 	var/persistent_debris_allowed = TRUE
+	/// Dirty flooring allowed
+	var/dirt_buildup_allowed = TRUE
 
 	/// If mining tunnel generation is allowed in this area
 	var/tunnel_allowed = FALSE