(harmless) exception if recording is paused when it ends

```
Traceback (most recent call last):
  File "/home/paul/dev/Galicaster-ppettit/galicaster/classui/recorderui.py", line 733, in handle_status
    editb.set_sensitive(self.recorder.current_mediapackage and self.recorder.current_mediapackage.manual)
TypeError: Argument 1 does not allow None as a value
```