fix cover state issue

custom_components/localtuya/cover.py

@@ -109,9 +109,10 @@ class LocaltuyaCover(LocalTuyaEntity, CoverEntity):
         """Return if the cover is closed or not."""
         if self._config[CONF_POSITIONING_MODE] == COVER_MODE_NONE:
             return None
-        elif self._current_cover_position == 0:
+
+        if self._current_cover_position == 0:
             return True
-        elif self._current_cover_position == 100:
+        if self._current_cover_position == 100:
             return False
         return None