Make the Win32 debug version of Viewer useable again by changing the assertion in SetFocus() to a warning. r=karnaze@netscape.com sr=attinasi@netscape.com a=asa@mozilla.org git-svn-id: svn://10.0.0.236/trunk@116644 18797224-902f-48f8-a5cc-f745e15eee43