[Libburn] iso bug fixes

[Todd Kulesza]

Derek Foreman wrote:
> If I get some time this weekend, I'll see if I can finish up TAO
> recording.  Then maybe it's time for another release.

Cool.  Just so you know, I'm working on Rock-Ridge support right now; 
the framework is in place to write out the data in the correct place in 
the image, but I still need to write the functions to determine what 
that data should contain.  I was hoping to finish that up this weekend, 
but that doesn't look like it's going to happen.  It shouldn't be too 
much longer, though.

Cheers,
Todd