Bug#650694: slang2: Broken build-dependency: libpng15-dev | libpng-dev

[Philipp Kern <pkern@debian.org>]

Package: slang2
Version: 2.2.4-4
Severity: serious

This change caused the buildd to enter a give-back loop because it's not
satisfiable:

   * Build against libpng-dev | libpng15-dev for libpng15 transition.

Actually you changed it to libpng15-dev | libpng-dev.  buildds look at the
first alternative only, which does not exist.  The package is now unbuildable
in unstable.

Also the transition hasn't started yet at all, it wasn't even ACKed by the
Release Team yet in any way.

Kind regards
Philipp Kern