There is a new pull request by klarasm against master on the void-packages repository

https://github.com/klarasm/void-packages seahorse-gpg2.4
https://github.com/void-linux/void-packages/pull/42055

seahorse: allow building with GnuPG-2.4.x
This patch is taken from upstream but is not in any released version yet

- I tested the changes in this PR: see #41948

A patch file from https://github.com/void-linux/void-packages/pull/42055.patch is attached