Merged revisions 78635 via svnmerge from

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

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  r78635 | victor.stinner | 2010-03-03 22:53:41 +0100 (mer., 03 mars 2010) | 5 lines

  Issue #3299: fix curses.panel.new_panel() error handler, replace PyObject_DEL()
  by Py_DECREF() to avoid a crash in pydebug mode.

  Use po->wo==NULL to detect than the panel is in the lop list or not.
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