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

https://github.com/ScrelliCopter/void-packages openmpt
https://github.com/void-linux/void-packages/pull/26103

libopenmpt: update to 0.5.3


A patch file from https://github.com/void-linux/void-packages/pull/26103.patch is attached