Changes since tag v4.1.21

commit c45e99993bb9bbf7b1e546c29a0f196f6ae8be0d
Author: Hendrik Leppkes <h.leppkes@gmail.com>
Date:   Mon Jan 22 00:19:00 2018 +0100

    Add a missing color entry for the second demonology warlock guardian bar

commit a128655dd19b995cd5ea1f816c88793249f80db9
Author: Hendrik Leppkes <h.leppkes@gmail.com>
Date:   Mon Jan 22 00:11:11 2018 +0100

    Check that unit is set before trying to register the state driver

