64-bit cleanness fix for vorbisfile (one variable declared incorrectly).
64-bit cleanness fix for vorbisfile (one variable declared incorrectly).

svn path=/trunk/vorbis/; revision=3531

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