c5184e9 SBUS: Use default GetAll invoker if none is set

1 file Authored by pbrezina 8 years ago, Committed by jhrozek 8 years ago,
    SBUS: Use default GetAll invoker if none is set
    
    It is alright for an interface to not have any GetAll invoker set
    if it doesn't have any properties, but we still want to return
    an empty message.
    
    Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>