[issue22733] MSVC ffi_prep_args doesn't handle 64-bit arguments properly

[Rafał Chłodnicki]

Rafał Chłodnicki added the comment:

Maybe worth backporting to 3.3 and up? Especially if #20160 is to be backported as they seem to be related.

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nosy: +Rafał Chłodnicki

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<http://bugs.python.org/issue22733>
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