UIInput throws IllegalArgumentException for unknown event types in broadcast()

broadcast() method of UIComponent should threw IllegalArgumentException if the implementation class of event argument was not supported by the component in JSF 1.1

It seems that there is no such requirement in JSF 1.2 standard, but UIInput still checks for ValueChangeEvent type and throws exception if it so not so. That enforces component developers not to call super.broadcast in UIInput-derived components