[issue13210] Support Visual Studio 2010

[Richard Oudkerk]

Richard Oudkerk <shibturn at gmail.com> added the comment:

> This doesn't change that, and as far as I know, this has worked and 
> continues to work.  "errno" is supported.

Using your patch, does the following throw an AssertionError?

>>> import os, errno
>>> try:
...   os.read(-1, 10)
... except OSError as e:
...   assert e.errno == errno.EBADF
...
>>>

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<http://bugs.python.org/issue13210>
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