Airlock and APC changes.

- Added a debugger device that can figure out when an object has been hacked/emagged
- Hacked APCs no longer display blue screen
- You can now disassemble emagged airlocks, they will yield a fried airlock electronic.

code/game/objects/items/devices/debugger.dm

@@ -0,0 +1,44 @@
+/**
+ * Multitool -- A multitool is used for hacking electronic devices.
+ * TO-DO -- Using it as a power measurement tool for cables etc. Nannek.
+ *
+ */
+
+/obj/item/device/debugger
+	name = "multitool"
+	desc = "Used for pulsing wires to test which to cut. Not recommended by doctors."
+	icon_state = "multitool"
+	flags = FPRINT | TABLEPASS| CONDUCT
+	force = 5.0
+	w_class = 2.0
+	throwforce = 5.0
+	throw_range = 15
+	throw_speed = 3
+	desc = "You can use this on airlocks or APCs to try to hack them without cutting wires."
+	m_amt = 50
+	g_amt = 20
+	origin_tech = "magnets=1;engineering=1"
+	var/obj/machinery/telecomms/buffer // simple machine buffer for device linkage
+
+/obj/item/device/debugger/is_used_on(obj/O, mob/user)
+	if(istype(O, /obj/machinery/power/apc))
+		var/obj/machinery/power/apc/A = O
+		if(A.emagged || A.malfhack)
+			usr << "\red There is a software error with the device."
+		else
+			usr << "\blue The device's software appears to be fine."
+		return 1
+	if(istype(O, /obj/machinery/door))
+		var/obj/machinery/door/D = O
+		if(D.operating == -1)
+			usr << "\red There is a software error with the device."
+		else
+			usr << "\blue The device's software appears to be fine."
+		return 1
+	else if(istype(O, /obj/machinery))
+		var/obj/machinery/A = O
+		if(A.emagged)
+			usr << "\red There is a software error with the device."
+		else
+			usr << "\blue The device's software appears to be fine."
+		return 1

code/game/objects/objs.dm

@@ -16,6 +16,8 @@
 	var/damtype = "brute"
 	var/force = 0
 
+/obj/item/proc/is_used_on(obj/O, mob/user)
+
 /obj/proc/process()
 	processing_objects.Remove(src)
 	return 0

code/game/objects/structures/door_assembly.dm

@@ -349,7 +349,7 @@ obj/structure/door_assembly
 			src.state = 0
 			src.name = "Secured Airlock Assembly"
 
-	else if(istype(W, /obj/item/weapon/airlock_electronics) && state == 1 )
+	else if(istype(W, /obj/item/weapon/airlock_electronics) && state == 1 && W:icon_state != "door_electronics_smoked")
 		playsound(src.loc, 'sound/items/Screwdriver.ogg', 100, 1)
 		user.visible_message("[user] installs the electronics into the airlock assembly.", "You start to install electronics into the airlock assembly.")
 		user.drop_item()