isisd: Revert the modifications to the link list

Accessing a link-list that is being deleted should not be authorized. 

Signed-off-by: zhou-run <166502045+zhou-run@users.noreply.github.com>

lib/linklist.c

@@ -331,7 +331,7 @@ void list_delete_all_node(struct list *list)
 		next = node->next;
 		if (*list->del)
 			(*list->del)(node->data);
-		list_delete_node(list, node);
+		listnode_free(list, node);
 	}
 	list->head = list->tail = NULL;
 	list->count = 0;