Allows playback of nonprimary audio streams in multiple bitrate sources,
such as mmsh://wmscr1.dr.dk/e02ch03m
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
This fixes playback of at least one MMST stream.
Patch by Zhentan Feng <spyfeng gmail com>.
Originally committed as revision 24793 to svn://svn.ffmpeg.org/ffmpeg/trunk