Don't use get_area proc, introduce myArea variable.

Conflicts:
	code/modules/power/power.dm

code/controllers/master_controller.dm

@@ -267,7 +267,7 @@ datum/controller/game_controller/proc/process()
 
 					continue
 
-		machines = machines - Machinery
+		Machinery.removeAtProcessing()
 
 /datum/controller/game_controller/proc/processObjects()
 	for (var/obj/Object in processing_objects)

code/game/machinery/machinery.dm

@@ -112,16 +112,27 @@ Class Procs:
 	var/global/gl_uid = 1
 	var/custom_aghost_alerts=0
 	var/panel_open = 0
+	var/myArea
 
 /obj/machinery/New()
-	..()
+	addAtProcessing()
+	return ..()
+
+/obj/machinery/proc/addAtProcessing()
+	myArea = loc.loc
 	machines += src
 
-/obj/machinery/Destroy()
+/obj/machinery/proc/removeAtProcessing()
+	myArea = null
 	machines -= src
+
+/obj/machinery/Destroy()
+	if (src in machines)
+		removeAtProcessing()
+
 	..()
 
-/obj/machinery/process()//If you dont use process or power why are you here
+/obj/machinery/process() // If you dont use process or power why are you here
 	return PROCESS_KILL
 
 /obj/machinery/emp_act(severity)

code/modules/power/power.dm

@@ -54,12 +54,16 @@
 
 // increment the power usage stats for an area
 
-/obj/machinery/proc/use_power(var/amount, var/chan = -1, var/autocalled = 0) // defaults to power_channel
-	var/area/A = src.loc.loc		// make sure it's in an area
+
+/obj/machinery/proc/use_power(var/amount, var/chan = -1, var/autocalled = 0) // defaults to power_channel) // defaults to power_channel
+	var/area/A = src.myArea
+
 	if(!A || !isarea(A) || !A.master)
 		return
+
 	if(chan == -1)
 		chan = power_channel
+
 	A.master.use_power(amount, chan)
 	if(!autocalled)
 		A.master.powerupdate = 2	// Decremented by 2 each GC tick, since it's not auto power change we're going to update power twice.