Merged revisions 68767,68769-68770 via svnmerge from

Merged revisions 68767,68769-68770 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r68767 | benjamin.peterson | 2009-01-19 09:11:51 -0600 (Mon, 19 Jan 2009) | 9 lines

  Merged revisions 68755 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

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    r68755 | benjamin.peterson | 2009-01-18 18:08:08 -0600 (Sun, 18 Jan 2009) | 1 line

    raise an OSError for invalid fds #4991
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  r68769 | benjamin.peterson | 2009-01-19 09:15:02 -0600 (Mon, 19 Jan 2009) | 1 line

  reenable the invalid fd test for fdopen
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  r68770 | benjamin.peterson | 2009-01-19 09:19:46 -0600 (Mon, 19 Jan 2009) | 1 line

  fix compiler warning
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