[issue22207] Test for integer overflow on Py_ssize_t: explicitly cast to size_t

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

I think there are too many changes. Here is simpler patch which get rid of all warnings in Objects/unicodeobject.c on my computer (gcc 4.6.3, 32-bit Linux).

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Added file: http://bugs.python.org/file36451/unicode_2.patch

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