[issue12282] build process adds CWD (null entry) to PYTHONPATH if PYTHONPATH is set in the build environment

[Éric Araujo]

Changes by Éric Araujo <merwok at netwok.org>:


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nosy: +eric.araujo
versions:  -Python 3.1

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12282>
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