Merge branch 'cwc' into 'master'

【修改内容】更新版本号为1.4.7

See merge request chenweican/k-sdk!208

VERSION

-1.4.6
\ No newline at end of file
+1.4.7
\ No newline at end of file

application/klansdk/kk_data_handle.c

@@ -751,6 +751,7 @@ static int kk_device_historyalarm_handle(cJSON *payload)
 		cJSON *identifier = cJSON_GetObjectItem(client_list ,"identifier");
 		if(identifier == NULL){
 			cJSON_Delete(infoItem);
+			cJSON_Delete(contentObj);
 			return -1;
 		}