List length needs to be updated on remove operation.

Author: ayusmand

src/chapter03linkedlists/LinkedList.java

@@ -115,13 +115,17 @@ public synchronized ListNode removeFromEnd() {
 		ListNode p = head, q = null, next = head.getNext();
 		if (next == null) {
 			head = null;
+			// reduce the length of the list
+			length-=1;
 			return p;
 		}
 		while((next = p.getNext()) != null) { 
 			q = p; 
 			p = next;
 		}
 		q.setNext(null);
+		// reduce the length of the list
+		length-=1;
 		return p;
 	}