I've been getting sloppy lately... didn;t run streaming tests against
most recent vorbisfile state machine fix ebcause I thought it didn't
affect non-seekable.  I was wrong, and the chnage broke things.

This fixes non-seekable input and I actually ran all the basic tests
(streaming, seekable, seeking, crosslapping and full chain tests)
before this commit.

Monty

svn path=/trunk/vorbis/; revision=5343