[issue6271] mmap: don't close file description if fd=-1

[STINNER Victor]

Changes by STINNER Victor <victor.stinner at haypocalc.com>:


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keywords: +patch
Added file: http://bugs.python.org/file14269/mmap_close.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6271>
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