Don't log an error if a user already left the room while processing a #leaveRoom request.

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@325 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/messenger/muc/spi/MUCUserImpl.java

@@ -21,6 +21,7 @@ import org.jivesoftware.util.*;
 import org.jivesoftware.messenger.*;
 import org.jivesoftware.messenger.auth.UnauthorizedException;
 import org.jivesoftware.messenger.user.UserAlreadyExistsException;
+import org.jivesoftware.messenger.user.UserNotFoundException;
 
 /**
  * Implementation of MUCUser. There will be a MUCUser per user that is connected to one or more 
@@ -419,6 +420,9 @@ public class MUCUserImpl implements MUCUser {
                                 roles.remove(group.toLowerCase());
                                 role.getChatRoom().leaveRoom(role.getNickname());
                             }
+                            catch (UserNotFoundException e) {
+                                // Do nothing since the users has already left the room
+                            }
                             catch (Exception e) {
                                 Log.error(e);
                             }