lmm_constraint_t constraint;
lmm_variable_t variable;
double value;
-} s_lmm_element_t, *lmm_element_t;
+} s_lmm_element_t;
#define make_elem_active(elem) xbt_swag_insert_at_head(elem,&(elem->constraint->active_element_set))
#define make_elem_inactive(elem) xbt_swag_remove(elem,&(elem->constraint->active_element_set))