Fix for listening activity

src/mpv_control.py

@@ -47,7 +47,7 @@ if track_activity_history:
     def time_observer(_name, value):
         # Here, _value is either None if nothing is playing or a float containing
         # fractional seconds since the beginning of the file.
-        if value and player.http_header_fields != [] and player.pause is False:
+        if value and src.fw_api.current_instance.token != None and player.pause is False:
             if value >= 30.0 and value <= 30.1:
                 # detect 30 secs for reporting listen activity
                 track = player_fw_storage.storage.get(track_url_to_uuid())