Auto Lathe Runtime Fixes (tgstation#83587)

## About The Pull Request
- Fixes tgstation#83581

Using an autolathe in any area without an APC causes this runtime
![Screenshot
(417)](https://github.com/tgstation/tgstation/assets/110812394/bb10adbc-3702-4255-b93b-ca722cb8d67c)

Also caught another bug which causes the UI to hang if the lathe runs
out of material mid printing

## Changelog

:cl:
fix: autolathes don't hang when printing items in areas without apc or
if it runs out of materials mid printing
/:cl:

---------

Co-authored-by: san7890 <[email protected]>

code/game/machinery/autolathe.dm

@@ -329,17 +329,21 @@
 	if(!directly_use_energy(charge_per_item)) // provide the wait time until lathe is ready
 		var/area/my_area = get_area(src)
 		var/obj/machinery/power/apc/my_apc = my_area.apc
-		var/charging_wait = my_apc.time_to_charge(charge_per_item)
-		if(!isnull(charging_wait))
-			say("Unable to continue production, APC overload. Wait [DisplayTimeText(charging_wait, round_seconds_to = 1)] and try again.")
+		if(!QDELETED(my_apc))
+			var/charging_wait = my_apc.time_to_charge(charge_per_item)
+			if(!isnull(charging_wait))
+				say("Unable to continue production, APC overload. Wait [DisplayTimeText(charging_wait, round_seconds_to = 1)] and try again.")
+			else
+				say("Unable to continue production, power grid overload.")
 		else
-			say("Unable to continue production, power grid overload.")
+			say("Unable to continue production, no APC in area.")
 		finalize_build()
 		return
 
 	var/is_stack = ispath(design.build_path, /obj/item/stack)
 	if(!materials.has_materials(materials_needed, material_cost_coefficient, is_stack ? items_remaining : 1))
 		say("Unable to continue production, missing materials.")
+		finalize_build()
 		return
 	materials.use_materials(materials_needed, material_cost_coefficient, is_stack ? items_remaining : 1)