if (findConstraint(cib, ID(xml_node)) == NULL) ret = add_node_copy(cib, XML_CIB_TAG_CONSTRAINTS, xml_node);  FNRET(ret);
FNRET(add_res);
addConstraint(xmlNodePtr cib, cibConstraint *xml_node){	int ret = -1;	FNIN();	if (findConstraint(cib, ID(xml_node)) == NULL)		ret = add_node_copy(cib, XML_CIB_TAG_CONSTRAINTS, xml_node);	FNRET(ret);}