rem: if (strncmp(tuple->contact.s, _contact->s, _contact->len) == 0) {
add: if (str_strcmp(&tuple->contact, _contact) == 0) {
context: int find_presence_tuple(str* _contact, presentity_t *_p, presence_tuple_t ** _t){	presence_tuple_t *tuple;	if (!_contact || !_contact->len || !_p || !_t) {		paerrno = PA_INTERNAL_ERROR;		LOG(L_ERR, "find_presence_tuple(): Invalid parameter value\n");		return -1;	}	tuple = _p->tuples;	LOG(L_ERR, "find_presence_tuple: _p=%p _p->tuples=%p\n", _p, _p->tuples);	while (tuple) {		if (strncmp(tuple->contact.s, _contact->s, _contact->len) == 0) {			*_t = tuple;			return 0;		}		tuple = tuple->next;	}	return 1;}