[issue36381] Preapre for mandatory PY_SSIZE_T_CLEAN

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

> * 3.8: PendingDeprecationWarning

... Or maybe use directly DeprecationWarning? :-)
https://discuss.python.org/t/pendingdeprecationwarning-is-really-useful/1038

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<https://bugs.python.org/issue36381>
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