Merged revisions 81662 via svnmerge from

Merged revisions 81662 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r81662 | ronald.oussoren | 2010-06-03 11:47:21 +0200 (Thu, 03 Jun 2010) | 9 lines

  Fix for issue #7724: ensure that distutils and python's own setup.py
  honor the MacOSX SDK when one is specified.

  This is needed to be able to build using the 10.4u SDK while running
  on OSX 10.6.

  This is a fixed version of the patch in r80963, I've tested this patch
  on OSX and Linux.
........