-Small improvements to atmos. Most notable is combining two loops into one during initialization and commenting out a loop with no nested code.

-Set chunk/update to be a background proc.
-Made it so the Eye's loc won't be set to null when moving out of the map.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4735 316c924e-a436-60f5-8080-3fe189b3f50e

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

@@ -42,7 +42,6 @@
 /datum/camerachunk/proc/visibilityChanged(turf/loc)
 	if(!(loc in visibleTurfs))
 		return
-
 	hasChanged()
 
 // Updates the chunk, makes sure that it doesn't update too much. If the chunk isn't being watched it will
@@ -62,6 +61,8 @@
 
 /datum/camerachunk/proc/update()
 
+	set background = 1
+
 	var/list/newVisibleTurfs = list()
 
 	for(var/obj/machinery/camera/c in cameras)

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

@@ -103,7 +103,9 @@
 		user.sprint = initial
 
 	for(var/i = 0; i < max(user.sprint, initial); i += 20)
-		user.eyeobj.setLoc(get_turf(get_step(user.eyeobj, direct)))
+		var/turf/step = get_turf(get_step(user.eyeobj, direct))
+		if(step)
+			user.eyeobj.setLoc(step)
 
 	user.cooldown = world.timeofday + 5
 	if(user.acceleration)