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

https://github.com/mhmdanas/void-packages libass-0.17.1
https://github.com/void-linux/void-packages/pull/42957

libass: update to 0.17.1, adopt.
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#### Testing the changes
- I tested the changes in this PR: **briefly** (tested with mpv)

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A patch file from https://github.com/void-linux/void-packages/pull/42957.patch is attached