fix thread quit

zhangmeng

2019-08-05 2d4b871401ace5a54eaff1cbfacd008c586ad928

 csrc/buz/recorder.hpp

@@ -64,6 +64,8 @@
                std::mutex              mutex_pkt_;
               std::condition_variable cv_;

                std::unique_ptr<std::thread> thrd_;
                
                std::string             dir_;
                std::string             id_;