DOF_ID_DIFTREG
h.dofh_ident[DOF_ID_DIFTREG]);
dof->dofh_ident[DOF_ID_DIFTREG] = DIF_DTR_NREGS;
hp->dofh_ident[DOF_ID_DIFTREG] = dtp->dt_conf.dtc_diftupregs;
dof->dofh_ident[DOF_ID_DIFTREG] = DIF_DTR_NREGS;
if (dof->dofh_ident[DOF_ID_DIFTREG] > DIF_DTR_NREGS) {