New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/31183#issuecomment-851694797

Comment:
gnulib is kinda borked:

```
/* Override WINT_MIN and WINT_MAX if gnulib's <wchar.h> or <wctype.h> overrides
   wint_t.  */
#if @GNULIBHEADERS_OVERRIDE_WINT_T@
# undef WINT_MIN
# undef WINT_MAX
# define WINT_MIN 0x0U
# define WINT_MAX 0xffffffffU
#endif
```

`GNULIBHEADERS_OVERRIDE_WINT_T` ends up empty and the `#if ` line makes the preprocessor error out.