Ogg: duration not computed in preparsing

Unlike MP3, Ogg files duration is not precomputed in preparsing. In other words, the DEMUX_GET_LENGTH control fails if called immediately after Open().

Also http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=673338

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information