[MPlayer-dev-eng] Bad image after seeking ASF/WMV files since SVN-r30420

[william0wang]

SVN-r30420 has moved the resync-related code, it cause bad image after
seeking ASF/WMV files.

static void demux_resync(demuxer_t *demuxer)
{
...
    if (sh_video) {
        ds_fill_buffer(demuxer->video);
        resync_video_stream(sh_video);
    }
...
}

Use 'ds_fill_buffer' before 'resync_video_stream' may be the reason.