下面的代码片段用于在双向链表中删除一个节点。请在横线处填入（ ），使其能正确实现相应功能。

1void deleteNode(DoublyListNode*& head, int value) {2   DoublyListNode* current = head;3   while (current != nullptr && current->val != value) {4      current = current->next;5   }6   if (current != nullptr) {7      if (current->prev != nullptr) {8        ____________________________________ // 在此处填入代码9      } else {10         head = current->next;11      }12      if (current->next != nullptr) {13         current->next->prev = current->prev;14      }15      delete current;16   }17}