BugID:17646749:[mqtt] extend MQTT_CONNECT_REQUIRED_BUFLEN from 256 with 32B for clientID
#define MQTT_DYNBUF_RECV_MARGIN (8)
-#define MQTT_CONNECT_REQUIRED_BUFLEN (256)
+#define MQTT_CONNECT_REQUIRED_BUFLEN (256+32)
/* MQTT send publish packet */
