[mythtv] strlen bug in mythweb 0.15

[Chris Petersen]

> In themes/Default/video.php ther is a few lines that contains:
> rawurlencode(substr($show->filename,strlen($videodir)+1))
> The problem is the +1 part, it cuts of the first char of the directory and
> that makes the links point to the wrong directory.

Try now.  I just committed a fix that hopefully catches this and the
subdirectory bug reported by Mike Jasper (since they were related)...

-Chris