Patch for bug 79231 - hanging after playing mp3

[Damon Chaplin <damon ximian com>]

I've added a patch to:

  http://bugzilla.gnome.org/show_bug.cgi?id=79231


I found a few other problems with the music view while I was testing
this, and I fixed those as well. It works perfectly for me now :)


Damon