vls->labels = hsh_create (8, compare_int_val_lab, hash_int_val_lab,
free_int_val_lab, vls);
ivl = create_int_val_lab (vls, value, label);
vlpp = hsh_probe (vls->labels, ivl);
vls->labels = hsh_create (8, compare_int_val_lab, hash_int_val_lab,
free_int_val_lab, vls);
ivl = create_int_val_lab (vls, value, label);
vlpp = hsh_probe (vls->labels, ivl);