New comment by KF-Art on void-packages repository

https://github.com/void-linux/void-packages/issues/36869#issuecomment-1463251830

Comment:
> I tried, but I gave up.
> 
> [diff.txt](https://github.com/void-linux/void-packages/files/9003858/diff.txt)
> 
> Fails on this error ¯\_(ツ)_/¯
> 
> ```
> 
> 
> ../subprojects/libliftoff/test/libdrm_mock.c:117:6: error: variable 'ret' set but not used [-Werror=unused-but-set-variable]
>   117 |  int ret;
>       |      ^~~
> cc1: all warnings being treated as errors
> ```

Using ` -Wno-unused-but-set-variable` to `libliftoff` `meson.build` seems to correct it. I made a patch for that.

```
diff -ruN a/meson.build b/meson.build
--- a/meson.build	2023-03-05 12:36:15.000000000 -0600
+++ b/meson.build	2023-03-09 21:04:10.598647298 -0600
@@ -23,6 +23,7 @@
 
 	'-Wno-missing-braces',
 	'-Wno-unused-parameter',
+    '-Wno-unused-but-set-variable',
 ]), language: 'c')
 
 liftoff_inc = include_directories('include')
```