Changed default access to shieldwallgens to Teleporter.

It used security before, meaning nobody who could enter the room would be able to use the generators.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@5416 316c924e-a436-60f5-8080-3fe189b3f50e

code/game/machinery/shieldgen.dm

@@ -358,7 +358,7 @@
 		icon_state = "Shield_Gen"
 		anchored = 0
 		density = 1
-		req_access = list(access_security)
+		req_access = list(access_teleporter)
 		var/active = 0
 		var/power = 0
 		var/state = 0