Comment 5 for bug 566003

It looks like this fix found it's way to myth's 0.23-fixes branch: http://svn.mythtv.org/trac/changeset/24252/branches/release-0-23-fixes/mythtv/libs/libmythtv/avformatdecoder.cpp

I tried it out (built two versions with just this as the difference) and it fixes DVD playback.