Bug#944900: boswars-data: Crash on launching 'antarticum.map' game

[Steve]

Package: boswars-data
Version: 2.7
Severity: important
Tags: newcomer patch upstream

Dear Maintainer,

On launching 'antarticum.map' (in list of games), Boswars begins to load,
then on loading /usr/share/games/boswars/maps/antarticum.map/terrain.png
Boswars crashes. This is due to the file terrain.png being an invalid PNG
file. The current version of libpng16-16 treats the problem as a critical
error (earlier versions of libpng16-16 did not exhibit this problem).

To fix the bug, /usr/share/games/boswars/maps/antarticum.map/terrain.png
must be replaced with a valid PNG file. The upstream version of Boswars also
has this bug, but upstream appears to be abandoned.

I have a valid version of this 'terrain.png' file which is a drop-in
replacement. Please advise how to send the fix to you.

Steve

-- System Information:
Debian Release: 10.1
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 5.2.0-0.bpo.3-686 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled