Fix code warning.

Change-Id: Ib11fb49f528d3688351ae349d5b4e307c28b3967
diff --git a/mbtk/test/libmbtk_mqtt/mbtk_mqtt_aliyun_test.c b/mbtk/test/libmbtk_mqtt/mbtk_mqtt_aliyun_test.c
index 923b123..fc6820e 100755
--- a/mbtk/test/libmbtk_mqtt/mbtk_mqtt_aliyun_test.c
+++ b/mbtk/test/libmbtk_mqtt/mbtk_mqtt_aliyun_test.c
@@ -18,6 +18,8 @@
 */
 
 int aliyun_xiyinyimi_connect(mbtk_mqtt_device_session_t *device, regnwl_info_t *regn);
+void iot_yield(Cloud_MQTT_t *piot_mqtt,iot_device_info_t *gateway);
+
 
 struct opts_struct opts = {
     (char *)"iot-dev", 0, (char *)"\n", QOS0, "admin", "password", (char *)"localhost", 1883, 0
@@ -40,7 +42,7 @@
     return miot_mqtt;
 }
 
-void mqtt_data_rx_cb(void *pbuf, int len) 
+void mqtt_data_rx_cb(void *pbuf, int len)
 {
 
     printf("data = %s\n", (unsigned char *)pbuf);	//打印接收到的数据
@@ -49,7 +51,7 @@
 
 void MQTTMessageArrived_Cb(MessageData* md)
 {
-    MQTTMessage *message = md->message; 
+    MQTTMessage *message = md->message;
 
     Cloud_MQTT_t *piot_mqtt = get_mqtt_t();
 
@@ -63,7 +65,7 @@
 {
     while (gateway.iotstatus != IOT_STATUS_DROP){
         printf("gateway.iotstatus is %d\n",gateway.iotstatus);
-        iot_yield(arg,&gateway);									//维持服务器稳定,断开重连
+        iot_yield((Cloud_MQTT_t*)arg,&gateway);									//维持服务器稳定,断开重连
     }
     printf("gateway.iotstatus is IOT_STATUS_DROP");
 //    mqtt_device_disconnect(arg);
@@ -78,9 +80,9 @@
 {
 
     printf("aliyun mqtt start2\n");
-    int ret, len; 
+//  int ret, len;
     char will_msg[256] = {"hello world"};						//初始化遗嘱数据
-    static int i = 0;
+//  static int i = 0;
 
     mbtk_mqtt_device_session_t mbtk_mqtt_device = {0};
     memcpy(mbtk_mqtt_device.device_name, argv[1] , strlen(argv[1]));
@@ -98,8 +100,8 @@
     mbtk_aliyun_mqtt_one_type_one_secret_unregin_set_info_init(Iot_mqtt, &mbtk_mqtt_device,60*1000,4,mqtt_data_rx_cb);
 
     mqtt_will_msg_set(Iot_mqtt, will_msg, strlen(will_msg));	//设置遗嘱
-    set_mqtt_t(Iot_mqtt);   
-    ret = mbtk_aliyun_mqtt_one_type_one_secret_unregin_device_connect(Iot_mqtt);						//初始化并连接mqtt服务器
+    set_mqtt_t(Iot_mqtt);
+    mbtk_aliyun_mqtt_one_type_one_secret_unregin_device_connect(Iot_mqtt);						//初始化并连接mqtt服务器
 
     printf("connect success\n");
     int rc = mbtk_MQTTSubscribe(&Iot_mqtt->Client, Iot_mqtt->sub_topic, opts.qos, MQTTMessageArrived_Cb);
@@ -124,7 +126,7 @@
 int aliyun_xiyinyimi_connect(mbtk_mqtt_device_session_t *device, regnwl_info_t *regn)
 {
 
-    int ret, len; 
+    int ret;
     char will_msg[256] = {"hello world"};						//初始化遗嘱数据
     static int retry_count = 0;
     pthread_t thread_ID;      //定义线程id
@@ -133,17 +135,17 @@
     Cloud_MQTT_t *Iot_mqtt;
     Iot_mqtt = (Cloud_MQTT_t *)malloc(sizeof(Cloud_MQTT_t));
     memset(Iot_mqtt,0x0,sizeof(Cloud_MQTT_t));
-    
 
-    iot_aliyun_mqtt_one_type_one_secret_unregin_connect_init(Iot_mqtt,device, regn->clientId, regn->deviceToken, 30,3,"aaa","aaa",mqtt_data_rx_cb);	
 
-//    iot_mqtt_init(Iot_mqtt,host,port, client, user, pass,30,3,"aaa","aaa",mqtt_data_rx_cb);	
+    iot_aliyun_mqtt_one_type_one_secret_unregin_connect_init(Iot_mqtt,device, regn->clientId, regn->deviceToken, 30,3,"aaa","aaa",mqtt_data_rx_cb);
+
+//    iot_mqtt_init(Iot_mqtt,host,port, client, user, pass,30,3,"aaa","aaa",mqtt_data_rx_cb);
 
     mqtt_will_msg_set(Iot_mqtt, will_msg, strlen(will_msg));	//设置遗嘱
 
-    set_mqtt_t(Iot_mqtt);    
+    set_mqtt_t(Iot_mqtt);
     ret = mqtt_device_connect(Iot_mqtt);						//初始化并连接mqtt服务器
-    
+
 
     while (ret < 0 && retry_count <= 5) {
         printf("ret = %d\r\n", ret);
@@ -155,7 +157,7 @@
     if(ret < 0 && retry_count > 5)
     {
         printf("reconnect times more than 5 exit\n");
-        return NULL;
+        return -1;
     }
     retry_count = 0;
 
@@ -167,7 +169,7 @@
         return 0;
     }
     gateway.iotstatus = IOT_STATUS_CONNECT;
-    
+
     pthread_create(&thread_ID, NULL, &mqtt_thread, (void *)Iot_mqtt);	//创建一个线程执行mqtt客户端
     pthread_detach(thread_ID);	//设置线程结束收尸
 
diff --git a/mbtk/test/libmbtk_mqtt/mbtk_mqtt_test.c b/mbtk/test/libmbtk_mqtt/mbtk_mqtt_test.c
index 5d99258..684878f 100755
--- a/mbtk/test/libmbtk_mqtt/mbtk_mqtt_test.c
+++ b/mbtk/test/libmbtk_mqtt/mbtk_mqtt_test.c
@@ -11,6 +11,7 @@
 #include "fcntl.h"
 #include "mbtk_sock2.h"
 
+void iot_yield(Cloud_MQTT_t *piot_mqtt,iot_device_info_t *gateway);
 
 struct opts_struct opts = {
     (char *)"iot-dev", 0, (char *)"\n", QOS0, "admin", "password", (char *)"localhost", 1883, 0
@@ -70,7 +71,7 @@
         printf("input error.\n example:./mqtt_test 192.168.1.1 8080 clientid username password\n");
         return 0;
     }
-    int ret, len;
+    int ret ;
     char will_msg[256] = {"hello world"};						//初始化遗嘱数据
     static int retry_count = 0;
     pthread_t thread_ID;      //定义线程id
@@ -96,7 +97,7 @@
     if(ret < 0 && retry_count > 5)
     {
         printf("reconnect times more than 5 exit\n");
-        return NULL;
+        return -1;
     }
     retry_count = 0;