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

https://github.com/fccapria/void-packages dwm-6.4
https://github.com/void-linux/void-packages/pull/40108

dwm: update to 6.4.
#### Testing the changes
- I tested the changes in this PR: **briefly**

#### Local build testing
- I built this PR locally for my native architecture, (x86_64-glibc)
- I built this PR locally for these architectures:
  - i686
  - x86_64-musl
  - aarch64
  - armv6l

A patch file from https://github.com/void-linux/void-packages/pull/40108.patch is attached