Merged revisions 68460 via svnmerge from

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

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  r68460 | kristjan.jonsson | 2009-01-09 14:31:26 -0600 (Fri, 09 Jan 2009) | 1 line

  Issue 4293:  Make Py_AddPendingCall() thread safe
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