fix memory leak

liuxiaolong

2021-07-20 13c503b73b4ecc8ce4a6e344f9ac15202985d686

 src/bh_api.cc

@@ -226,6 +226,10 @@
{
   return BHApi_In1_Out1<MsgTopicList>(&TopicNode::Subscribe, topics, topics_len, reply, reply_len, timeout_ms);
}
int BHSubscribeNetTopics(const void *topics, const int topics_len, void **reply, int *reply_len, const int timeout_ms)
{
   return BHApi_In1_Out1<MsgTopicList>(&TopicNode::SubscribeNet, topics, topics_len, reply, reply_len, timeout_ms);
}

int BHPublish(const void *msgpub,
              const int msgpub_len,