change every IntPtr<->int cast to IntPtr<->long. we got 64 bit integers with lua now, and a pointer is 64 bits, so might avoid some dumb bug due to truncations and some ungodly amount of ram being used

TODO: see if we can skip this cast nonsense. the lua tests indicate IntPtr should pass through fine, being considered "userdata", probably better so the user can't just pass raw numbers for the handle.

Author: CasualPokePlayer