`intptr_t` is incorrectly mapped to `ptr int` -- should be `int`
I'm wrapping a header that uses the standard C type `intptr_t`. The Nim translation comes out as `ptr int`. This is incorrect and causes errors trying to use such a parameter.

The [C documentation](https://en.cppreference.com/w/c/types/integer) says `intptr_t` is a "signed integer type capable of holding a pointer", so the correct Nim type should be `int`.