修复无人机和机场相对高度低于0时无法返航的bug

sample/src/main/java/com/dji/sample/control/model/dto/ReturnHomeState.java

@@ -21,7 +21,8 @@ public class ReturnHomeState extends RemoteDebugHandler {
         return deviceRedisService.getDeviceOnline(sn)
                 .map(DeviceDTO::getChildDeviceSn)
                 .flatMap(deviceSn -> deviceRedisService.getDeviceOsd(deviceSn, OsdDockDrone.class))
-                .map(osd -> osd.getElevation() > 0 && modeCodeCanReturnHome(osd.getModeCode()))
+                //.map(osd -> osd.getElevation() > 0 && modeCodeCanReturnHome(osd.getModeCode()))
+                .map(osd -> modeCodeCanReturnHome(osd.getModeCode()))
                 .orElse(false);
     }