troy 4b7e8b60ba Changed AddObserver() to check if the observer is already in the list.
This worksaround a problem with the pres shell being added twice


git-svn-id: svn://10.0.0.236/trunk@4189 18797224-902f-48f8-a5cc-f745e15eee43
1998-06-20 00:45:05 +00:00
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