- lmm_constraint_t *cnst = calloc(nb_cnst, sizeof(lmm_constraint_t));
- lmm_variable_t *var = calloc(nb_var, sizeof(lmm_variable_t));
- int *used = calloc(nb_cnst, sizeof(int));
+ lmm_constraint_t *cnst = xbt_new0(lmm_constraint_t, nb_cnst);
+ lmm_variable_t *var = xbt_new0(lmm_variable_t, nb_var);
+ int *used = xbt_new0(int, nb_cnst);