[issue23553] Reduce the number of comparison for range checking.

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

> Wouldn't size_t always work for Py_ssize_t?

Yes. But it wouldn't work for say off_t.

The consistent way is always use size_t instead of Py_ssize_t. But this boat has sailed.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23553>
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