Prevents NPE (by not trying to respond to a IQ response) JM-1237 (reviewed by Gato)

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@10304 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/session/LocalOutgoingServerSession.java

@@ -557,6 +557,10 @@ public class LocalOutgoingServerSession extends LocalSession implements Outgoing
         RoutingTable routingTable = XMPPServer.getInstance().getRoutingTable();
         try {
             if (packet instanceof IQ) {
+            	if (((IQ) packet).isResponse()) {
+            		Log.debug("XMPP specs forbid us to respond with an IQ error to: " + packet);
+            		return;
+            	}
                 IQ reply = new IQ();
                 reply.setID(packet.getID());
                 reply.setTo(packet.getFrom());