Unity 1.2 bug: InterfaceInterceptor can't wrap an interface that inherits from another interface

异常症状见：http://entlib.codeplex.com/WorkItem/View.aspx?WorkItemId=21827 和 http://unity.codeplex.com/WorkItem/View.aspx?WorkItemId=3685

 尝试了无数方案，都不见效。最后还是替换成virtualmethodInterceptor