Re-fix for earlier fix for bug # 104761. Re-fix provided by timm. See bug report

for further details.

cmd/xfe/forms.c

@@ -2899,6 +2899,7 @@ fe_mocha_submit_form_cb (MWContext *context, LO_Element *element, int32 event,
   {
       context = XP_FindNamedContextInList(context, (char*)data->window_target);
       data->window_target = NULL;
+      url->window_target = NULL;
  }