gnucash: New tag 'bad'

[John Ralls]

        at  https://github.com/Gnucash/gnucash/commit/2a42078e (commit)


commit 2a42078e9a6ca920a342264b5caf4c8571316cbd
Author: John Ralls <jralls at ceridwen.us>
Date:   Sat May 30 15:18:18 2020 -0700

    Prevent libstdc++ copysign declaration error on Win32.