plugin XEP-0045: fixed room configuration cancellation

sat/plugins/plugin_xep_0045.py

@@ -305,6 +305,9 @@ class XEP_0045(object):
         return d
 
     def _submitConfiguration(self, raw_data, profile):
+        cancelled = C.bool(raw_data.get("cancelled", C.BOOL_FALSE))
+        if cancelled:
+            return defer.succeed({})
         client = self.host.getClient(profile)
         try:
             session_data = self._sessions.profileGet(raw_data["session_id"], profile)