The helper check_node_type() is only used when DEBUG is set (in the
function below), but ASSERTED macro uses NDEBUG. So just guard the
helper with #ifdef. If we see more such cases we might consider a
ASSERTED-like macro for the DEBUG case.
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>