MNT: use PyLong_* instead of PyInt_* by tacaswell · Pull Request #620 · msgpack/msgpack-python

methane

9af421163cb8081414be347038dee7a82b29e8dd in Cython (not released yet) removed back-compatibility #define.

This was the most obvious fix, but I'm not sure how far back it works. I can also put the required #define (conditionally) at the top of this file if you would prefer that.