One of the Mozilla fixes for #1573 (working around liboggplay  ignoring an error return value) broke chaining by causing  vorbis_synthesis_init() to fail on a second call.  Fixed.
One of the Mozilla fixes for #1573 (working around liboggplay 
ignoring an error return value) broke chaining by causing 
vorbis_synthesis_init() to fail on a second call.  Fixed.


svn path=/trunk/vorbis/; revision=17177

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