Merged revisions 68302 via svnmerge from

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

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  r68302 | mark.dickinson | 2009-01-04 16:06:40 +0000 (Sun, 04 Jan 2009) | 4 lines

  Oops.  Need to check not only that HAVE_DECL_ISINF is defined, but also
  that it's equal to 1.  (If isinf isn't defined, HAVE_DECL_ISINF is
  defined to be 0, rather than being undefined.)
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