message: operator to check for success
diff: @@ -115,6 +115,9 @@ namespace wampcc {
  : reqid(0),
  was_error(false),
  user(0){}
  +
  + /** Check if this result indicates a success, i.e. not an error */
  + explicit operator bool() const noexcept { return was_error == false; }
  };
  typedef std::function< void (wamp_call_result) > wamp_call_result_cb;
  