Check for torrents in queue before calling the api stop_torrent() (#53895)

Co-authored-by: Joakim Sørensen <hi@ludeeus.dev>

homeassistant/components/transmission/__init__.py

@@ -447,6 +447,8 @@ class TransmissionData:
 
     def stop_torrents(self):
         """Stop all active torrents."""
+        if len(self._torrents) == 0:
+            return
         torrent_ids = [torrent.id for torrent in self._torrents]
         self._api.stop_torrent(torrent_ids)