Disable error pages in composer (webpage editor) b=300022 r=biesi sr=darin a=asa

git-svn-id: svn://10.0.0.236/trunk@175861 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/editor/ui/composer/content/editor.js

@@ -527,6 +527,7 @@ function SetFocusOnStartup()
 function EditorStartup()
 {
   var ds = GetCurrentEditorElement().docShell;
+  ds.useErrorPages = false;
   var root = ds.QueryInterface(Components.interfaces.nsIDocShellTreeItem).
     rootTreeItem.QueryInterface(Components.interfaces.nsIDocShell);