mkv download, rygel uses 100 cpu

[Chris Fahlman <chrisfahlman gmail com>]

Hi,

Rygel was using 100% of one cpu during and then after the downloading
of an mkv file into a watched directory. After I killed and restarted
Rygel, it was OK.
It's done this twice (two different mkv files), once using Ubuntu's
version, and once using Rygel 0.10.1.54-ca2ac from git. I have
[GstRenderer] enabled=true in the conf file.