fix dedicated upnp testing

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@7122 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/de/anomic/net/UPnP.java

@@ -91,6 +91,7 @@ public class UPnP {
 	}
 	
 	private static String getRemoteHost() {
+		if (sb == null) return null;
 		return sb.getConfig(SwitchboardConstants.UPNP_REMOTEHOST, "");
 	}