Explicit width type usage for numPoints?

[hobu]

The size of int can be platform specific. Is there any possibility of defining https://github.com/nianticlabs/spz/blob/main/src/cc/splat-c-types.h#L14 as a type of explicit width like int32_t or uint64_t or something?

[dzeitman]

@hobu Agreed.

[nbutko]

@hobu happy to update this (or approve a merge request), question: should antialiased be uint8_t instead of bool?