添加断流重连是否接着前一次继续写;修复断流重连成功后hls时间戳错误问题

src/MediaFile/HlsMaker.h

@@ -92,6 +92,7 @@ protected:
 protected:
     uint32_t _seg_number = 0;
 private:
+    bool _noData = false;
     int _stampInc = 0;
     float _seg_duration = 0;
     uint64_t _file_index = 0;