From 46b09b4efbf7d965bcdc97c3b8d5696bf2b93f04 Mon Sep 17 00:00:00 2001
From: Bedshaped <fraggle14@gmail.com>
Date: Mon, 19 Sep 2016 05:59:01 +0100
Subject: [PATCH] Fixes #943 (#950)

---
 code/modules/events/vent_clog.dm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/code/modules/events/vent_clog.dm b/code/modules/events/vent_clog.dm
index 99dcab70313..7e6bd6f7e8d 100644
--- a/code/modules/events/vent_clog.dm
+++ b/code/modules/events/vent_clog.dm
@@ -14,6 +14,8 @@
 /datum/event/vent_clog/setup()
 	endWhen = rand(25, 100)
 	for(var/obj/machinery/atmospherics/unary/vent_scrubber/temp_vent in machines)
+		if(!temp_vent)
+			continue
 		if(temp_vent.z in config.station_levels)//STATION ZLEVEL
 			if(temp_vent.network.normal_members.len > 20)
 				vents += temp_vent