-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/FEA/FEA_airgroup.dm

@@ -81,7 +81,8 @@ datum/air_group
 	turf/process_group()
 		current_cycle = air_master.current_cycle
 		if(!group_processing)	 //Revert to individual processing then end
-			for(var/turf/simulated/member in members)
+			for(var/T in members)
+				var/turf/simulated/member = T
 				member.process_cell()
 			return
 
@@ -204,12 +205,14 @@ datum/air_group
 			suspend_group_processing()
 		else
 			if(air.check_tile_graphic())
-				for(var/turf/simulated/member in members)
+				for(var/T in members)
+					var/turf/simulated/member = T
 					member.update_visuals(air)
 
 
 		if(air.temperature > FIRE_MINIMUM_TEMPERATURE_TO_EXIST)
-			for(var/turf/simulated/member in members)
+			for(var/T in members)
+				var/turf/simulated/member = T
 				member.hotspot_expose(air.temperature, CELL_VOLUME)
 				member.consider_superconductivity(starting=1)
 

code/FEA/FEA_gas_mixture.dm

@@ -163,7 +163,8 @@ What are the archived variables for?
 			else
 				burned_fuel = fuel_store.moles
 				oxygen -= fuel_store.moles
-				del(fuel_store)
+				trace_gases -= fuel_store
+				fuel_store = null
 
 			energy_released += FIRE_CARBON_ENERGY_RELEASED * burned_fuel
 			carbon_dioxide += burned_fuel

code/FEA/FEA_system.dm

@@ -154,17 +154,10 @@ datum
 				for(var/turf/simulated/S in world)
 					if(!S.blocks_air && !S.parent && S.z < 5) // Added last check to force skipping asteroid z-levels -- TLE
 						assemble_group_turf(S)
-				for(var/turf/simulated/S in world) //Update all pathing and border information as well
 					if(S.z > 4) // Skipping asteroids -- TLE
 						continue
 					S.update_air_properties()
-/*
-				for(var/obj/movable/floor/S in world)
-					if(!S.parent)
-						assemble_group_object(S)
-				for(var/obj/movable/floor/S in world) //Update all pathing and border information as well
-					S.update_air_properties()
-*/
+
 				world << "\red \b Geometry processed in [(world.timeofday-start_time)/10] seconds!"
 
 			assemble_group_turf(turf/simulated/base)
@@ -284,7 +277,8 @@ datum
 				return 1
 
 			process_update_tiles()
-				for(var/turf/simulated/T in tiles_to_update)
+				for(var/turf in tiles_to_update)
+					var/turf/simulated/T = turf
 					T.update_air_properties()
 /*
 				for(var/obj/movable/floor/O in tiles_to_update)
@@ -296,7 +290,8 @@ datum
 				var/turf/list/turfs = list()
 
 				for(var/datum/air_group/turf/turf_AG in groups_to_rebuild) //Deconstruct groups, gathering their old members
-					for(var/turf/simulated/T in turf_AG.members)
+					for(var/turf in turf_AG.members)
+						var/turf/simulated/T = turf
 						T.parent = null
 						turfs += T
 					del(turf_AG)
@@ -309,7 +304,7 @@ datum
 
 //				var/obj/movable/list/movable_objects = list()
 
-				for(var/datum/air_group/object/object_AG in groups_to_rebuild) //Deconstruct groups, gathering their old members
+//				for(var/datum/air_group/object/object_AG in groups_to_rebuild) //Deconstruct groups, gathering their old members
 /*
 					for(var/obj/movable/floor/OM in object_AG.members)
 						OM.parent = null

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)