Bugfix: Avoid IndexError when no video description is present

[alukach]

This plugin stopped working a few weeks ago on my machine (unable to view 'All Shows'). After some investigation, I noticed that an IndexError was being raised from listShows(). This occurs due to the fact that the Vice: Shows page has a show listed without a description:

<li class="story story-square">
    <a class="story_thumbnail" href="/every-woman"><img width="220" height="220" src="http://assets.vice.com/content-images/series/every-woman/show_image/showtrailer_vice_220x220.jpg" /></a>    <h2><a href="/every-woman">Every Woman</a></h2>
    <p></p>
</li>

When the regex encounters the empty <p> tag, it returns an empty string as the match. When the following line attempts to get the 0 index of that empty string, an IndexError occurs.

These changes return a list object with an empty string at the 0 index when no match is found by regex, thus avoiding the IndexError.

This bug could theoretically occur anywhere where the results of a regex are accessed at index 0 without first scrutinizing the results.

ps: I love this plugin! Thanks for putting it up in the first place! (:thumbsup:)

[AddonScriptorDE]

Jep, forgot to add the fix to github / xbmc.org repo.
It's currently only available via my testing-repo:
http://code.google.com/p/addonscriptorde-beta-repo/downloads/detail?name=repository.addonscriptorde-beta.zip&can=2&q=
Should be available via xbmc.org soon...