[issue1309352] Make fcntl work properly on AMD64

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

As for the calling convention concern, it seems to me that a sane ABI
wouldn't make a difference between ints and longs - both should fit in a
standard machine word.

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stage: test needed -> patch review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue1309352>
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