ZC1_EMPTY
zsp->z_cond = ZC1_EMPTY;
if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
if (zsp->z_cond != ZC1_EMPTY)
zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
zsp->z_cond = ZC1_EMPTY;
zsp->z_cond = ZC1_EMPTY;