File extension matching fails with relative paths

[anongoblin]

media_types/__init__.py:109:
    if filename.find('.') > 0:

should be: if filename.find('.') >= 0:

Because otherwise files of the form "./blah.mp4" don't work, which happens with the localfiles plugin.

[anongoblin]

Fix

[Boris Bobrov]

Could you please test the fix above?

[Christopher Allan Webber]

LGTM.