UnicodeEncodeError fix

Fix for this problem:
http://xbmclogs.com/show.php?id=214280
In this case the search:
http://www.legendasdivx.com/modules.php?name=Downloads&file=jz&d_op=search_next&order=&form_cat=28&page=1&query=12+years+slave

Has 1 subtitle without any release in the description, and the script fails.

This fix solves that, I don't know if there is a more elegant way of fix it.