Comment 1 for bug 1494128

This is too old a bug to fix auto-magically

If a site is needing to upgrade from pre 1.4 to something more modern they will need to later the database pre-upgrade to:

1) Make sure all view_access rules are not null (they can use the view mtime as a logic ctime for this)
2) Make the view_access table ctime column to be a not-null column