[issue21932] os.read() must use Py_ssize_t for the size parameter

[Roundup Robot]

Roundup Robot added the comment:

New changeset e9b401d46e20 by Victor Stinner in branch 'default':
Issue #21932: os.read() now uses a :c:func:`Py_ssize_t` type instead of
http://hg.python.org/cpython/rev/e9b401d46e20

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nosy: +python-dev

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<http://bugs.python.org/issue21932>
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