修复保活时tfe_id错误初始化的问题

entry/src/tfe_mgr.cpp

@@ -159,9 +159,9 @@ static void* thread_tfe_keepalive_accept(void *args){
     char client_ipaddr_str[INET_ADDRSTRLEN] = "";
     int flags, ret, client_fd;
     pthread_t thread_id = -1;
-    int tfe_id = -1;
     char *errmsg = NULL;
     while(true){
+        int tfe_id = -1;
         client_fd = accept(sockfd, (struct sockaddr *)&client_addr, &client_addr_len);
         if(client_fd < 0){
             KNI_LOG_ERROR(logger, "Failed at accept, errno is %d, errmsg is %s, tfe_id is %d", errno, strerror(errno), tfe_id);