center save shm on each node, no bind to shm.

lichao

2021-05-21 b2484c8bd77a9d21bcf1827f554444535196953d

 src/topic_node.h

@@ -19,7 +19,7 @@
#define TOPIC_NODE_YVKWA6TF

#include "msg.h"
#include "socket.h"
#include "shm_socket.h"
#include <atomic>
#include <memory>
#include <mutex>