Merge pull request #10151 from Ghommie/Ghommie-cit450

refactors area code to allow for multiple areas to share the same APC, fire, air alarms etc.

code/game/mecha/equipment/tools/other_tools.dm

@@ -283,7 +283,7 @@
 /obj/item/mecha_parts/mecha_equipment/tesla_energy_relay/proc/get_charge()
 	if(equip_ready) //disabled
 		return
-	var/area/A = get_area(chassis)
+	var/area/A = get_base_area(chassis)
 	var/pow_chan = get_power_channel(A)
 	if(pow_chan)
 		return 1000 //making magic
@@ -328,7 +328,7 @@
 		occupant_message("No powercell detected.")
 		return
 	if(cur_charge < chassis.cell.maxcharge)
-		var/area/A = get_area(chassis)
+		var/area/A = get_base_area(chassis)
 		if(A)
 			var/pow_chan
 			for(var/c in list(EQUIP,ENVIRON,LIGHT))