[Libburn] Writing progress issues

[Tiago Cogumbreiro]

Hi again guys,
I am trying to develop the writing progress part.
I am very confused about how to display the lead-in/out progress, could
you please point me out how to work with:
Disc Lead-In
Disc Lead-Out
Session Lead-In
Session Lead-Out
I need to know how to process start_sector and end_sector.

Now i am simply going to ignore the lead-* and show progress related to
track writing.

Tiago Cogumbreiro