修复获取设备任务数据存在问题

Controller/SensorGateway/SmartSceneController.py

@@ -982,7 +982,7 @@ class SmartSceneView(View):
         @return: task_list
         """
         # 只下发最后一个任务
-        last_task = tasks_list[-1:]
+        last_task = tasks_list.pop()
         sensor_type = int(last_task['device_type'])
         task_temp = {
             'sensor_type': sensor_type,