DOF_MAG_MAG0
dof->dofh_ident[DOF_ID_MAG0] = DOF_MAG_MAG0;
if (dof->dofh_ident[DOF_ID_MAG0] != DOF_MAG_MAG0 ||
hp->dofh_ident[DOF_ID_MAG0] = DOF_MAG_MAG0;
dof->dofh_ident[DOF_ID_MAG0] = DOF_MAG_MAG0;