Fix link to ogg_stream_state.
Fix link to ogg_stream_state.

Thanks to David Richards for the report.

svn path=/trunk/ogg/; revision=18217

ksophocleous/ogg,eidy/libogg,felipebetancur/ogg,brion/ogg,mwgoldsmith/ogg,eidy/libogg,ShiftMediaProject/ogg,ShiftMediaProject/ogg,mwgoldsmith/ogg,emscripten-ports/Ogg,xiph/ogg,nicolaichuk/ogg,brion/ogg,emscripten-ports/Ogg,xiph/ogg,ksophocleous/ogg,felipebetancur/ogg,youfearm3/ogg,nicolaichuk/ogg,youfearm3/ogg