Bug 139026, Removing strict warnings. Patch by walk84@yahoo.com, r=cbiesinger@web.de, sr=jaggernaut@netscape.com

suite/common/pref/nsPrefWindow.js

@@ -189,7 +189,7 @@ nsPrefWindow.prototype =
             for( var pageTag in this.wsm.dataManager.pageData )
               {
                 var pageData = this.wsm.dataManager.getPageData( pageTag );
-                if (pageData.initialized)
+                if ("initialized" in pageData && pageData.initialized)
                   {
                 for( var elementID in pageData )
                   {