node_t *new_node = cl_malloc(sizeof(node_t));
new_node = cl_malloc(sizeof(node_t));
node_copy(node_t *this_node) {	if(this_node == NULL) {		print_node(this_node);		return NULL;	}	node_t *new_node = cl_malloc(sizeof(node_t));	new_node->id     = cl_strdup(this_node->id); 	new_node->weight = this_node->weight; 	new_node->fixed  = this_node->fixed; 	return new_node;}