Build fails with gcc 15 - possible fix

Hi, building fails with gcc 15.x due to incompatible pointer types. I was able to get the build working by adding the following line to ```/libtudor/meson.build```

```add_global_arguments('-Wno-incompatible-pointer-types', language : 'c')```

I'm not sure if this is the correct fix, but I was able to build with it.