[issue15730] Silence unused value warnings under Mac OS X 10.8/clang

[Ronald Oussoren]

Ronald Oussoren added the comment:

Patch looks good to me.

I've added 3.3 to the list of python versions because it might be worthwhile to apply this to 3.3 as well (after 3.3.0 is released).

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keywords: +needs review
versions: +Python 3.3

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