From a99005e0e8db4de030a2d5ea80b341b4212afaf4 Mon Sep 17 00:00:00 2001
From: MysticBoy <mysticboy@live.com>
Date: Tue, 26 May 2020 15:26:33 +0800
Subject: [PATCH] fix for  comparison of array 'tsMqttBrokerClientId' equal to
 a null pointer is       always false [-Werror,-Wtautological-pointer-compare]
   recnt_status.client_id = tsMqttBrokerClientId==NULL ||

---
 src/plugins/mqtt/src/mqttSystem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/plugins/mqtt/src/mqttSystem.c b/src/plugins/mqtt/src/mqttSystem.c
index 38741a70ca..45a8972d80 100644
--- a/src/plugins/mqtt/src/mqttSystem.c
+++ b/src/plugins/mqtt/src/mqttSystem.c
@@ -68,7 +68,7 @@ int32_t                  mqttInitSystem() {
   int _tpsize = strlen(topicPath) + strlen(TOPIC) + 1;
   recnt_status.topic = calloc(1, _tpsize);
   snprintf(recnt_status.topic, _tpsize-1, "/%s/" TOPIC, topicPath);
-  recnt_status.client_id = tsMqttBrokerClientId==NULL || strlen(tsMqttBrokerClientId)<3? tsMqttBrokerClientId:"taos_mqtt";
+  recnt_status.client_id = strlen(tsMqttBrokerClientId)<3? tsMqttBrokerClientId:"taos_mqtt";
 
 
   taos_init();