[Vorbis] ov_read, callbacks and 0 bytes read

[Andrew Lentvorski]

Ralph Giles wrote:
> You can just 'ogg_sync_wrote()' whatever bytes you were able to read and 
> let it take care of buffering the data, and then go as far as you can 
> down the call sequence before returning and waiting for more data.

Thanks for the pointer to decoder_example.c!

Those examples don't exist in Tremor, so I missed them.  My apologies.

-a