Fixed two problem with airlock/APC commit:

- Debugger now sends messages to user instead of usr(whoops)
- Can now close emagged door with crowbar so you can take out circuit
- Couldn't weld emagged doors
- Replacing the circuitry should now be sufficient to fix an emagged door.

code/game/machinery/doors/airlock.dm

@@ -1169,7 +1169,7 @@ About the new airlock wires panel:
 		return
 
 	src.add_fingerprint(user)
-	if((istype(C, /obj/item/weapon/weldingtool) && !( src.operating ) && src.density))
+	if((istype(C, /obj/item/weapon/weldingtool) && !( src.operating > 0 ) && src.density))
 		var/obj/item/weapon/weldingtool/W = C
 		if(W.remove_fuel(0,user))
 			if(!src.welded)
@@ -1245,6 +1245,7 @@ About the new airlock wires panel:
 					ae.loc = src.loc
 				if(operating == -1)
 					ae.icon_state = "door_electronics_smoked"
+					operating = 0
 
 				del(src)
 				return

code/game/machinery/doors/door.dm

@@ -219,7 +219,7 @@
 
 /obj/machinery/door/proc/close()
 	if(density)	return 1
-	if(operating)	return
+	if(operating > 0)	return
 	operating = 1
 
 	animate("closing")

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

@@ -5,9 +5,10 @@
  */
 
 /obj/item/device/debugger
-	name = "multitool"
-	desc = "Used for pulsing wires to test which to cut. Not recommended by doctors."
-	icon_state = "multitool"
+	icon = 'icon/obj/hacktool.dmi'
+	name = "debugger"
+	desc = "Used to debug electronic equipment."
+	icon_state = "hacktool-g"
 	flags = FPRINT | TABLEPASS| CONDUCT
 	force = 5.0
 	w_class = 2.0
@@ -24,21 +25,21 @@
 	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."
+			user << "\red There is a software error with the device."
 		else
-			usr << "\blue The device's software appears to be fine."
+			user << "\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."
+			user << "\red There is a software error with the device."
 		else
-			usr << "\blue The device's software appears to be fine."
+			user << "\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."
+			user << "\red There is a software error with the device."
 		else
-			usr << "\blue The device's software appears to be fine."
+			user << "\blue The device's software appears to be fine."
 		return 1