-Obj/structure were being initialized before cameranet. I've added ticker checks to stop the runtimes that you get everytime you start the server..

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4608 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/mob/living/silicon/ai/freelook/update_triggers.dm

@@ -8,7 +8,7 @@
 	var/image/obscured
 
 /turf/proc/visibilityChanged()
-	if(cameranet)
+	if(ticker)
 		cameranet.updateVisibility(src)
 
 /turf/simulated/Del()
@@ -24,13 +24,13 @@
 // STRUCTURES
 
 /obj/structure/Del()
-	if(cameranet)
+	if(ticker)
 		cameranet.updateVisibility(src)
 	..()
 
 /obj/structure/New()
 	..()
-	if(cameranet)
+	if(ticker)
 		cameranet.updateVisibility(src)
 
 // DOORS