[issue21233] Add *Calloc functions to CPython memory allocation API

[Stefan Krah]

Stefan Krah added the comment:

The order of the nelem/elsize matters for readability. Otherwise it is
not intuitive what happens after the jump to redirect in _PyObject_Alloc().

Why would you assert that 'nelem' is one?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21233>
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