JM-1425: NPE when creating a group chat room for the default conference...

JM-1425: NPE when creating a group chat room for the default conference service with CS integration enabled.

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@10655 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/clearspace/ClearspaceMUCTranscriptManager.java

@@ -240,6 +240,9 @@ public class ClearspaceMUCTranscriptManager implements MUCEventListener {
     }
 
     private boolean isRoomOwner(JID roomJID, JID user) {
+        if (user == null || roomJID == null) {
+            return false;
+        }
         MultiUserChatService chatService =
                 XMPPServer.getInstance().getMultiUserChatManager().getMultiUserChatService(roomJID);
         MUCRoom room = chatService.getChatRoom(roomJID.getNode());