need_chain = false;

        // Deliberate fall through, resetting the step counter.

        // Deliberate fall through, resetting the revitalisation
        // chaining indicator and the step counter.

        need_chain = false;

        // Deliberate fall through, resetting the step counter.

        // Deliberate fall through, resetting the revitalisation
        // chaining indicator and the step counter.

        need_chain = false;

        // Deliberate fall through, resetting the step counter.

        // Deliberate fall through, resetting the revitalisation
        // chaining indicator and the step counter.

        need_chain = false;

        // Deliberate fall through, resetting the step counter.

        // Deliberate fall through, resetting the revitalisation
        // chaining indicator and the step counter.

        // Turn off revitalisation chaining.
        need_chain = false;

        // Do nothing.