TG: Runtimes are funtimes!

Revision: r2941
Author: 	 quartz235

code/game/objects/devices/PDA/cart.dm

@@ -515,8 +515,9 @@ Code:
 					for (var/obj/item/weapon/mop/M in world)
 						var/turf/ml = get_turf(M)
 
-						if (ml.z != cl.z)
-							continue
+						if(ml)
+							if (ml.z != cl.z)
+								continue
 
 						ldat += "Mop - <b>\[[ml.x],[ml.y]\]</b> - [M.reagents.total_volume ? "Wet" : "Dry"]<br>"
 

code/game/objects/structures.dm

@@ -84,7 +84,9 @@ obj/structure
 				Tsrc.ReplaceWithWall()
 				for(var/obj/machinery/atmospherics/pipe/P in Tsrc)
 					P.layer = 1
-				W:use(2)
+				for(var/turf/simulated/wall/X in Tsrc.loc)
+					if(X)	X.add_hiddenprint(usr)
+				if (W)	W:use(2)
 				del(src)
 			return
 
@@ -99,6 +101,8 @@ obj/structure
 					Tsrc.ReplaceWithRWall()
 					for(var/obj/machinery/atmospherics/pipe/P in Tsrc)
 						P.layer = 1
+					for(var/turf/simulated/wall/r_wall/X in Tsrc.loc)
+						if(X)	X.add_hiddenprint(usr)
 					if (W)
 						W:use(1)
 					del(src)