Fixed bug with AsyncWatcher and infinite timeout.

           >>>     process(msg)

        '''

        responses = []

        time_remains = timeout

        while self._expected_responses:

            try:

                dt, response = self._get_in_queue(timeout=time_remains)

                dt, response = self._get_in_queue(timeout=timeout)

            except Empty:

                break

            time_remains -= dt

            if timeout is not None:

                timeout -= dt

            responses.append(response)

            self._expected_responses.remove(response['id'])

            # Check for max_wait: