Committing SuperSayu and Kaze Espada's patch.

http://forums.nanotrasen.com/viewtopic.php?f=16&t=11958

Atmospherics:
 * Atmo computer UI auto updates again (simple interact() fix)
 * Injectors should show up on atmo computers without hitting refresh
 * Fixes Issue 1258

Powernets:
 * Rebuild powernets no longer breaks the system.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@5652 316c924e-a436-60f5-8080-3fe189b3f50e

code/ATMOSPHERICS/components/unary/outlet_injector.dm

@@ -105,6 +105,8 @@
 		..()
 
 		set_frequency(frequency)
+		spawn(rand(25,50))
+			broadcast_status()
 
 	receive_signal(datum/signal/signal)
 		if(!signal.data["tag"] || (signal.data["tag"] != id) || (signal.data["sigtype"]!="command"))

code/ATMOSPHERICS/components/unary/vent_pump.dm

@@ -190,62 +190,62 @@
 		if(!signal.data["tag"] || (signal.data["tag"] != id_tag) || (signal.data["sigtype"]!="command"))
 			return 0
 
-		if(signal.data["purge"] != null)
+		if("purge" in signal.data)
 			pressure_checks &= ~1
 			pump_direction = 0
 
-		if(signal.data["stabalize"] != null)
+		if("stabalize" in signal.data)
 			pressure_checks |= 1
 			pump_direction = 1
 
-		if(signal.data["power"] != null)
+		if("power" in signal.data)
 			on = text2num(signal.data["power"])
 
-		if(signal.data["power_toggle"] != null)
+		if("power_toggle" in signal.data)
 			on = !on
 
-		if(signal.data["checks"] != null)
+		if("checks" in signal.data)
 			pressure_checks = text2num(signal.data["checks"])
 
-		if(signal.data["checks_toggle"] != null)
+		if("checks_toggle" in signal.data)
 			pressure_checks = (pressure_checks?0:3)
 
-		if(signal.data["direction"] != null)
+		if("direction" in signal.data)
 			pump_direction = text2num(signal.data["direction"])
 
-		if(signal.data["set_internal_pressure"] != null)
+		if("set_internal_pressure" in signal.data)
 			internal_pressure_bound = between(
 				0,
 				text2num(signal.data["set_internal_pressure"]),
 				ONE_ATMOSPHERE*50
 			)
 
-		if(signal.data["set_external_pressure"] != null)
+		if("set_external_pressure" in signal.data)
 			external_pressure_bound = between(
 				0,
 				text2num(signal.data["set_external_pressure"]),
 				ONE_ATMOSPHERE*50
 			)
 
-		if(signal.data["adjust_internal_pressure"] != null)
+		if("adjust_internal_pressure" in signal.data)
 			internal_pressure_bound = between(
 				0,
 				internal_pressure_bound + text2num(signal.data["adjust_internal_pressure"]),
 				ONE_ATMOSPHERE*50
 			)
 
-		if(signal.data["adjust_external_pressure"] != null)
+		if("adjust_external_pressure" in signal.data)
 			external_pressure_bound = between(
 				0,
 				external_pressure_bound + text2num(signal.data["adjust_external_pressure"]),
 				ONE_ATMOSPHERE*50
 			)
 
-		if(signal.data["init"] != null)
+		if("init" in signal.data)
 			name = signal.data["init"]
 			return
 
-		if(signal.data["status"] != null)
+		if("status" in signal.data)
 			spawn(2)
 				broadcast_status()
 			return //do not update_icon

code/game/machinery/atmo_control.dm

@@ -93,6 +93,9 @@ obj/machinery/computer/general_air_control
 		user.set_machine(src)
 		onclose(user, "computer")
 
+	interact(mob/user)
+		attack_hand(user)
+
 	process()
 		..()
 		src.updateDialog()

code/modules/power/apc.dm

@@ -92,6 +92,14 @@
 		return
 	..()
 
+/obj/machinery/power/apc/connect_to_network()
+	//Override because the APC does not directly connect to the network; it goes through a terminal.
+	//The terminal is what the power computer looks for anyway.
+	if(!terminal)
+		make_terminal()
+	if(terminal)
+		terminal.connect_to_network()
+
 /obj/machinery/power/apc/New(turf/loc, var/ndir, var/building=0)
 	..()
 

code/modules/power/power.dm

@@ -98,8 +98,7 @@
 		C.powernet.cables += C
 
 	for(var/obj/machinery/power/M in machines)
-		if(!M.powernet)	continue	// APCs have powernet=0 so they don't count as network nodes directly
-		M.powernet.nodes[M] = M
+		M.connect_to_network()
 
 
 // returns a list of all power-related objects (nodes, cable, junctions) in turf,
@@ -396,6 +395,7 @@
 
 /obj/machinery/power/proc/connect_to_network()
 	var/turf/T = src.loc
+	if(!T || !istype(T)) return 0
 	var/obj/structure/cable/C = T.get_cable_node()
 	if(!C || !C.powernet)	return 0
 //	makepowernets() //TODO: find fast way	//EWWWW what are you doing!?