[issue3880] _tkinter._flatten() doesn't check PySequence_Size() error code

[Guilherme Polo]

Guilherme Polo <ggpolo at gmail.com> added the comment:

Looks fine, doesn't break anything in Tkinter either.

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nosy: +gpolo

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3880>
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