More Destroy()s, better implementation

- Re-implements Destroy() for SMES units. This time moves relevant (de)construction code all the way up to obj/machinery/. This should fix any potential GC issues with deconstruction of component-based machines.
- Implements Destroy() for breaker boxes.
- Fixes SMES units lacking disconnect_terminal(), causing GC errors.

code/modules/power/breaker_box.dm

@@ -19,6 +19,11 @@
 	var/RCon_tag = "NO_TAG"
 	var/update_locked = 0
 
+/obj/machinery/power/breakerbox/Destroy()
+	..()
+	for(var/obj/nano_module/rcon/R in world)
+		R.FindDevices()
+
 /obj/machinery/power/breakerbox/activated
 	icon_state = "bbox_on"
 

code/modules/power/power.dm

@@ -17,6 +17,8 @@
 
 /obj/machinery/power/Destroy()
 	disconnect_from_network()
+	disconnect_terminal()
+
 	..()
 
 ///////////////////////////////

code/modules/power/smes.dm

@@ -84,10 +84,12 @@
 	return
 
 
-/obj/machinery/power/smes/Destroy()
+/obj/machinery/power/smes/disconnect_terminal()
 	if(terminal)
-		disconnect_terminal()
-	..()
+		terminal.master = null
+		terminal = null
+		return 1
+	return 0
 
 /obj/machinery/power/smes/update_icon()
 	overlays.Cut()

code/modules/power/smes_construction.dm

@@ -76,12 +76,10 @@
 	should_be_mapped = 1
 
 /obj/machinery/power/smes/buildable/Destroy()
+	..()
 	qdel(wires)
-	if(component_parts)
-		for(var/atom/A in component_parts)
-			qdel(A)
-
-	return ..()
+	for(var/obj/nano_module/rcon/R in world)
+		R.FindDevices()
 
 
 // Proc: process()
@@ -354,6 +352,7 @@
 					if(I.reliability != 100 && crit_fail)
 						I.crit_fail = 1
 					I.loc = src.loc
+					component_parts -= I
 				qdel(src)
 				return