Fix for Lyricwiki script

[Tim Savannah]

Hey,

The lyricswiki script is broken on some newer entries.
http://lyrics.wikia.com/api.php?action=query&prop=revisions&rvprop=content&format=xml&titles=Third_Eye_Blind:Dopamine

The lyrics are contained within the "rev" tag on this song.

The following patch will fix that and lyrics will work on these songs.
Otherwise, you only get an error message.

I can't find a better place to submit patches, so if there is please
redirect me to it...
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