[bug#55295] [PATCH] gnu: gcolor3: Update to 0.2.4-28.6699c15

[Daniel Meißner]

Hi,

IMHO it's cleaner to just extract commit 
https://gitlab.gnome.org/World/gcolor3/-/commit/1750369a3fd922aa9db6916207dc460c6f885e14
 from upstream in a patch file and apply it to the package instead of packaging 
an unreleased version. I have done something similar for eog in 
https://issues.guix.gnu.org/53161#2

Thanks

-- 
Daniel