now it looks more natural and similar to the CORBA downcasting mechanism. git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@5587 626c5289-ae23-0410-ae9c-e8d60b6d4f22
git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@5584 626c5289-ae23-0410-ae9c-e8d60b6d4f22