Merge pull request #1601 from starry0819/master

更新 0707.设计链表.md Java示例代码部分功能

problems/0707.设计链表.md

@@ -353,8 +353,12 @@ class MyLinkedList {
             return;
         }
         size--;
+        if (index == 0) {
+            head = head.next;
+	    return;
+        }
         ListNode pred = head;
-        for (int i = 0; i < index; i++) {
+        for (int i = 0; i < index - 1; i++) {
             pred = pred.next;
         }
         pred.next = pred.next.next;