Merged revisions 79804 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

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  r79804 | mark.dickinson | 2010-04-05 19:07:51 +0100 (Mon, 05 Apr 2010) | 5 lines

  Use a more robust infinity check in _Py_HashDouble.

  This fixes a test_decimal failure on FreeBSD 8.0.  (modf apparently
  doesn't follow C99 Annex F on FreeBSD.)
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