Merge pull request #1004 from cadyn/airlockfix

Fix building new airlocks

code/game/machinery/doors/airlock.dm

@@ -1260,10 +1260,10 @@ About the new airlock wires panel:
 		//update the door's access to match the electronics'
 		secured_wires = electronics.secure
 		if(electronics.one_access)
-			req_access.Cut()
+			if(req_access) req_access.Cut()	//YWEdit
 			req_one_access = src.electronics.conf_access
 		else
-			req_one_access.Cut()
+			if(req_one_access) req_one_access.Cut()	//YWEdit
 			req_access = src.electronics.conf_access
 
 		//get the name from the assembly