textproc/dblatex: fix build with python 3.12 (and probably newer versions)
Patches used:
- https://sourceforge.net/p/dblatex/patches/12/ by Miro Hrončok
- https://sourceforge.net/p/dblatex/patches/13/ by Michael J Gruber
PR: 291803
Reported-by: D'Arcy J.M. Cain <darcy@druid.net>
Obtained-from: https://sourceforge.net/projects/dblatex/
Author: Christian Ullrich <chris@chrullrich.net>