There is an updated pull request by ndowens against master on the void-packages repository

https://github.com/ndowens/void-packages valabind
https://github.com/void-linux/void-packages/pull/26874

valabind: update to 1.7.2.
0.48 vala patch was implemented in this version.
Re-write 0.50 vala patch so it applies cleanly

A patch file from https://github.com/void-linux/void-packages/pull/26874.patch is attached