[issue31786] In select.poll.poll() ms can be 0 if timeout < 0

[Riccardo Coccioli]

Change by Riccardo Coccioli <rcoccioli at gmail.com>:


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nosy: +Riccardo Coccioli

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31786>
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