修复设备列表bug。

sample/src/main/java/com/dji/sample/manage/service/impl/DeviceServiceImpl.java

@@ -671,7 +671,7 @@ public class DeviceServiceImpl extends ServiceImpl<IDeviceMapper, DeviceEntity>
         device.setStatus(deviceRedisService.checkDeviceOnline(sn));
         // 查询 无人机
         List<DeviceDTO> childrenList = this.getDevicesByParams(DeviceQueryParam.builder().deviceSn(device.getChildDeviceSn()).build());
-        if (!devicesList.isEmpty()) {
+        if (!childrenList.isEmpty()) {
             device.setChildren(childrenList.get(0));
         }
         return Optional.of(device);