#1 Playback cant be stopped when playing the same file twice

[Frank Bille]

If you start playback of a file in the playlist by
doubleclicking it and then doubleclick it again, you
won't be able to stop it.

HOW TO REPRODUCE:

1) Make sure you have uploaded a file.
2) Add a file to the playlist.
3) Doubleclick it to start playback.
4) When playback starts, doubleclick it again.
5) The only way to stop playback is to exit the client.

[Frank Bille]

Logged In: YES
user_id=31253

You can also reproduce this bug by doubleclicking a file in
your playlist to start playback and then doubleclick another
file. The two songs will then play simultanisly and you then
wont be able to stop the first song.