From 72fbf9a1811d07fff9f3f7e2cd93e4a4a8207dbd Mon Sep 17 00:00:00 2001
From: Bjorn Neergaard <bjorn@neersighted.com>
Date: Tue, 9 Feb 2016 23:06:43 -0600
Subject: [PATCH] Fix click catcher runtime

Check that a turf exists when attempting to click it
This can happen if someone manages to click off the edge of the Z-level

The following runtime has occured 48 time(s).
runtime error: Cannot execute null.Click().
proc name: Click (/obj/screen/click_catcher/Click)
  source file: click.dm,345
  usr: Drone (758) (/mob/living/simple_animal/drone)
  src:  (/obj/screen/click_catcher)
---
 code/_onclick/click.dm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/code/_onclick/click.dm b/code/_onclick/click.dm
index e8297662c85..ce33b9097f4 100644
--- a/code/_onclick/click.dm
+++ b/code/_onclick/click.dm
@@ -342,5 +342,6 @@
 		C.swap_hand()
 	else
 		var/turf/T = screen_loc2turf(modifiers["screen-loc"], get_turf(usr))
-		T.Click(location, control, params)
+		if(T)
+			T.Click(location, control, params)
 	return 1