Attaching a patch based off 3.5.0a3.

Note, for Py_ssize_t I had to add:

#ifdef PY_SSIZE_T_CLEAN
        Py_ssize_t lNode, lUser, lName;
#else
        int lNode, lUser, lName;
#endif

As if I did not, the values I got back were garbage. Is this because of some configuration parameter I failed to use?

However, the patch builds on s390x and x86_64 and the test passes on the former and is skipped on the latter.