[ogg-dev] Fixing ogg vorbis corruption caused by bad metadata

[Monty Montgomery]

Confirmed--- the checksum on the second page (the comment page where
the album art was added) is incorrect.  Vorbis players are not allowed
to decode any stream in which one of the setup headers is corrupt, and
a bad checksum counts as corrupt.

Unfortunately, this means none of the remuxing ogg tools in our
toolchains will touch those pages either; they will remux and fix most
problems with valid pages, but a bad checksum usually means the page
is toast, so they won't try.

Monty