Handle default notify data in webostv (#66770)

homeassistant/components/webostv/notify.py

@@ -46,8 +46,8 @@ class LgWebOSNotificationService(BaseNotificationService):
             if not self._client.is_connected():
                 await self._client.connect()
 
-            data = kwargs.get(ATTR_DATA, {})
-            icon_path = data.get(CONF_ICON)
+            data = kwargs.get(ATTR_DATA)
+            icon_path = data.get(CONF_ICON) if data else None
             await self._client.send_message(message, icon_path=icon_path)
         except WebOsTvPairError:
             _LOGGER.error("Pairing with TV failed")