Merged revisions 78868-78869 via svnmerge from

Merged revisions 78868-78869 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r78868 | victor.stinner | 2010-03-12 15:20:59 +0100 (ven., 12 mars 2010) | 25 lines

  Merged revisions 78835-78837 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

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    r78835 | victor.stinner | 2010-03-11 13:34:39 +0100 (jeu., 11 mars 2010) | 7 lines

    Issue #7774: Set sys.executable to an empty string if argv[0] has been
    set to an non existent program name and Python is unable to retrieve the real
    program name.

    Fix also sysconfig: if sys.executable is an empty string, use the current
    working directory.
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    r78836 | victor.stinner | 2010-03-11 14:27:35 +0100 (jeu., 11 mars 2010) | 4 lines

    Fix test_executable introduce in previous commit (r78835): Windows is able to
    retrieve the absolute Python path even if argv[0] has been set to a non
    existent program name.
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    r78837 | victor.stinner | 2010-03-11 14:46:06 +0100 (jeu., 11 mars 2010) | 3 lines

    Another fix to test_executable() of test_sys: set the current working to avoid
    the #7774 bug.
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  r78869 | victor.stinner | 2010-03-12 15:27:16 +0100 (ven., 12 mars 2010) | 2 lines

  Oops, I loose the NEWS change in my previous backport (r78868) of r78835.
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