add notify node change.

lichao

2021-06-29 6c07fe29a5185835f28059f627a1d30e462da28b

 src/shm_msg_queue.h

@@ -29,7 +29,7 @@
{
public:
   typedef int64_t RawData;
   typedef ShmObject<SharedQ63> Shmq;
   typedef NamedShmObject<SharedQ63> Shmq;
   typedef Shmq::Data Queue;
   typedef Shmq::ShmType ShmType;
   typedef uint64_t MQId;