Committing for Aranclanos:

Fixes issue 986. (Constructed normal walls named wrong)
Fixes issue 1000. (Destroyed vent still shows up in air alarm)
Fixes issue 1003. (Glowshrooms don't give off light when planted!)
Fixes issue 1004. (Issues with (?) Command)

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4884 316c924e-a436-60f5-8080-3fe189b3f50e

code/ATMOSPHERICS/components/unary/vent_pump.dm

@@ -5,6 +5,7 @@
 	name = "Air Vent"
 	desc = "Has a valve and pump attached to it"
 
+	var/area/initial_loc
 	level = 1
 	var/area_uid
 	var/id_tag = null
@@ -41,10 +42,10 @@
 			icon_state = "in"
 
 	New()
-		var/area/A = get_area(loc)
-		if (A.master)
-			A = A.master
-		area_uid = A.uid
+		initial_loc = get_area(loc)
+		if (initial_loc.master)
+			initial_loc = initial_loc.master
+		area_uid = initial_loc.uid
 		if (!id_tag)
 			assign_uid()
 			id_tag = num2text(uid)
@@ -321,3 +322,8 @@
 				"You hear ratchet.")
 			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

code/ATMOSPHERICS/components/unary/vent_scrubber.dm

@@ -7,6 +7,7 @@
 
 	level = 1
 
+	var/area/initial_loc
 	var/id_tag = null
 	var/frequency = 1439
 	var/datum/radio_frequency/radio_connection
@@ -24,10 +25,10 @@
 	var/radio_filter_out
 	var/radio_filter_in
 	New()
-		var/area/A = get_area(loc)
-		if (A.master)
-			A = A.master
-		area_uid = A.uid
+		initial_loc = get_area(loc)
+		if (initial_loc.master)
+			initial_loc = initial_loc.master
+		area_uid = initial_loc.uid
 		if (!id_tag)
 			assign_uid()
 			id_tag = num2text(uid)
@@ -257,3 +258,8 @@
 				"You hear ratchet.")
 			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