-Fixed vent pumps/vent scrubbers runtiming on deletion when it is dragged and then consumed by a singularity.

-Fixed vents not correctly updating the area with their deletion.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@5329 316c924e-a436-60f5-8080-3fe189b3f50e

code/ATMOSPHERICS/components/unary/vent_pump.dm

@@ -323,7 +323,8 @@
 			new /obj/item/pipe(loc, make_from=src)
 			del(src)
 
-	/obj/machinery/atmospherics/unary/vent_pump/Del()
-		initial_loc.air_scrub_info -= id_tag
-		..()
-		return
+/obj/machinery/atmospherics/unary/vent_pump/Del()
+	if(initial_loc)
+		initial_loc.air_vent_info -= id_tag
+	..()
+	return

code/ATMOSPHERICS/components/unary/vent_scrubber.dm

@@ -259,7 +259,7 @@
 			new /obj/item/pipe(loc, make_from=src)
 			del(src)
 
-	/obj/machinery/atmospherics/unary/vent_scrubber/Del()
-		initial_loc.air_scrub_info -= id_tag
-		..()
-		return
+/obj/machinery/atmospherics/unary/vent_scrubber/Del()
+	initial_loc.air_scrub_info -= id_tag
+	..()
+	return