[issue20341] Argument Clinic: add "nullable ints"

[Tal Einat]

Tal Einat added the comment:

My only comment from reviewing the patch is that you seem to have used NULLABLE_PY_SSIZE_T_INITIALIZE by accident one time in int_converter (in clinic.py).

Other than that, as you already know, make sure to return 1 in both converters in the "if (arg == Py_None)" branches.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20341>
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