fix memory leak

liuxiaolong

2021-07-20 13c503b73b4ecc8ce4a6e344f9ac15202985d686

 src/bh_api.h

@@ -57,6 +57,11 @@
                      void **reply,
                      int *reply_len,
                      const int timeout_ms);
int BHSubscribeNetTopics(const void *topics,
                         const int topics_len,
                         void **reply,
                         int *reply_len,
                         const int timeout_ms);

typedef void (*FSubDataCallback)(const void *proc_id,
                                 int proc_id_len,