[vdr] Bug in MP3 Extension

["Matthias Queisler" <webmaster@internettest.de>]

I just played a little bit with the MP3 Extension and noticed a bug. I
replayed a playlist. I listend one title where all ID3 Informations are
present and then jumped to the next title. But this title got no artist
in the ID3 so the second row on my LCD should be empty. Instead of
nothing the artist of the previous title showed up on the second line so
that "Alien Ant Farm" was the artist of "Paid My Dues" :)

Cu,

Matthias Queisler