consume_internal_message does not return SpedPast

[wilkuz]

crates/flux/src/spine/consumer.rs line 376, the SpedPast arm does not currently return or log anything on SpedPast

    #[inline]
    pub fn consume_internal_message<P, R, F>(
        &mut self,
        producers: &mut P,
        mut read: F,
    ) -> DCacheRead<InternalMessage<T>, R>
    where
        P: SpineProducers,
        F: FnMut(&InternalMessage<T>, &[u8]) -> R,
    {
        loop {
            match self.inner.try_consume_with_epoch() {
               ...
                Err(ReadError::SpedPast) => {
                    self.inner.recover_after_error();
                    return DCacheRead::SpedPast // This should be added
                }
               ... 
        }
    }