[issue4501] asyncore's urgent data management and connection closed events are broken when using poll()

[Giampaolo Rodola']

Changes by Giampaolo Rodola' <billiejoex at users.sourceforge.net>:


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versions: +Python 2.4, Python 2.5, Python 2.5.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue4501>
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