* nist.javax.sip.stack.SIPDialogErrorEvent)
*/
public synchronized void dialogErrorEvent(
SIPDialogErrorEvent dialogErrorEvent) {
SIPDialog sipDialog = (SIPDialog) dialogErrorEvent.getSource();
SipListener sipListener = ((SipStackImpl)this).getSipListener();
// if the app is not implementing the SipListenerExt interface we delete
// the dialog to avoid leaks
if(sipDialog != null && !(sipListener instanceof SipListenerExt)) {
sipDialog.delete();
}