[issue27570] Avoid memcpy(. . ., NULL, 0) etc calls

[Roundup Robot]

Roundup Robot added the comment:

New changeset d465da1e5902 by Martin Panter in branch '2.7':
Issue #27570: Avoid zero-length memcpy() calls with null source pointers
https://hg.python.org/cpython/rev/d465da1e5902

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27570>
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