Merged revisions 75275 via svnmerge from

Merged revisions 75275 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r75275 | mark.dickinson | 2009-10-07 20:22:05 +0100 (Wed, 07 Oct 2009) | 6 lines

  Issue #7048: logb should round its result when that result doesn't fit
  into the available precision.  (Tests for this change are included in
  the most recent set of testcases from the Decimal Specification site;
  those testcases will be updated shortly.)
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