Clarify ProcessInjectionPoint type parameters

The container must fire an event for every injection point of every Java EE component class supporting injection that may
be instantiated by the container at runtime.

The event object must be of type javax.enterprise.inject.spi.ProcessInjectionPoint<T,X> where T is the bean class of the bean that declares the injection point, and X is the declared type of the injection point.

The first paragraph implies that this event may be fired for injection points not necesarilly defined on a bean. In that case, the value of the T type parameter is unclear.