fix potential bug.  luckily we weren't hit by it.
fix potential bug.  luckily we weren't hit by it.

svn path=/trunk/vorbis/; revision=2883

ShiftMediaProject/vorbis,eidy/vorbis,felipebetancur/vorbis,emscripten-ports/Vorbis,nicolaichuk/vorbis,youfearm3/vorbis,ShiftMediaProject/vorbis,ShiftMediaProject/vorbis,mwgoldsmith/vorbis,felipebetancur/vorbis,ksophocleous/vorbis,ksophocleous/vorbis,ShiftMediaProject/vorbis,eidy/vorbis,erikd/vorbis,nicolaichuk/vorbis,felipebetancur/vorbis,youfearm3/vorbis,mwgoldsmith/vorbis,youfearm3/vorbis,ShiftMediaProject/vorbis,erikd/vorbis,ksophocleous/vorbis,ShiftMediaProject/vorbis,mwgoldsmith/vorbis,nicolaichuk/vorbis,eidy/vorbis,emscripten-ports/Vorbis,mwgoldsmith/vorbis,felipebetancur/vorbis,emscripten-ports/Vorbis,ksophocleous/vorbis,erikd/vorbis,youfearm3/vorbis,emscripten-ports/Vorbis,erikd/vorbis,nicolaichuk/vorbis,eidy/vorbis