TG: Committing the one-way conveyor switches as posted by Donkieyo

http://nanotrasen.com/phpBB3/viewtopic.php?f=16&t=7759

They are currently present in the mail office.
Revision: r3104
Author: 	 baloh.matevz

code/modules/recycling/conveyor2.dm

@@ -126,6 +126,7 @@
 
 // attack with item, place item on conveyor
 /obj/machinery/conveyor/attackby(var/obj/item/I, mob/user)
+	if(isrobot(user))	return //Carn: fix for borgs dropping their modules on conveyor belts
 	user.drop_item()
 	if(I && I.loc)	I.loc = src.loc
 	return
@@ -263,6 +264,26 @@
 			S.position = position
 			S.update()
 
+/obj/machinery/conveyor_switch/oneway
+	var/convdir = 1 //Set to 1 or -1 depending on which way you want the convayor to go. (In other words keep at 1 and set the proper dir on the belts.)
+	desc = "A conveyor control switch. It appears to only go in one direction."
+
+// attack with hand, switch position
+/obj/machinery/conveyor_switch/oneway/attack_hand(mob/user)
+	if(position == 0)
+		position = convdir
+	else
+		position = 0
+
+	operated = 1
+	update()
+
+	// find any switches with same id as this one, and set their positions to match us
+	for(var/obj/machinery/conveyor_switch/S in world)
+		if(S.id == src.id)
+			S.position = position
+			S.update()
+
 // converyor diverter
 // extendable arm that can be switched so items on the conveyer are diverted sideways
 // situate in same turf as conveyor