Merge pull request #4230 from Ccomp5950/dirt_nerf

Cleanbot/dirt fix.

code/game/machinery/bots/cleanbot.dm

@@ -313,19 +313,22 @@ text("<A href='?src=\ref[src];operation=oddbutton'>[src.oddbutton ? "Yes" : "No"
 		target_types += /obj/effect/decal/cleanable/dirt
 
 /obj/machinery/bot/cleanbot/proc/clean(var/obj/effect/decal/cleanable/target)
-	src.anchored = 1
-	src.icon_state = "cleanbot-c"
+	anchored = 1
+	icon_state = "cleanbot-c"
 	visible_message("\red [src] begins to clean up the [target]")
-	src.cleaning = 1
+	cleaning = 1
 	var/cleantime = 50
 	if(istype(target,/obj/effect/decal/cleanable/dirt))		// Clean Dirt much faster
 		cleantime = 10
 	spawn(cleantime)
-		src.cleaning = 0
+		if(istype(loc,/turf/simulated))
+			var/turf/simulated/f = loc
+			f.dirt = 0
+		cleaning = 0
 		del(target)
-		src.icon_state = "cleanbot[src.on]"
-		src.anchored = 0
-		src.target = null
+		icon_state = "cleanbot[on]"
+		anchored = 0
+		target = null
 
 /obj/machinery/bot/cleanbot/explode()
 	src.on = 0