- Added null checks for get_mobs_in_radio_range().

- Added a check to EI NATH for humans who are brainless.
- Fixed fires runtiming. When I replaced del(src) with a garbage collecting proc, I forgot to return afterwards so the rest of the code didn't execute.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@5567 316c924e-a436-60f5-8080-3fe189b3f50e

code/FEA/FEA_turf_tile.dm

@@ -156,7 +156,7 @@ turf/simulated
 			else
 				air_master.active_singletons.Remove(src)
 		if(active_hotspot)
-			del(active_hotspot)
+			active_hotspot.Kill()
 		if(blocks_air)
 			for(var/direction in list(NORTH, SOUTH, EAST, WEST))
 				var/turf/simulated/tile = get_step(src,direction)