Calling plug_closing() is highly likely to result in a call to sk_close(),
authorben <ben@cda61777-01e9-0310-a592-d414129be87e>
Sat, 11 Jan 2003 17:36:24 +0000 (17:36 +0000)
committerben <ben@cda61777-01e9-0310-a592-d414129be87e>
Sat, 11 Jan 2003 17:36:24 +0000 (17:36 +0000)
so arrange that mactcp_poll() can cope with that and not access freed memory
when it happens.

git-svn-id: svn://svn.tartarus.org/sgt/putty@2545 cda61777-01e9-0310-a592-d414129be87e


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