Fix TreeNode always giving element before requested element in Tree

Author: moritzfl

src/main/java/de/moritzf/sorting/logic/sorting/TreeNode.java

@@ -44,7 +44,7 @@ public String toString() {
  public TreeNode<T> getNode(int index) {
  Queue<TreeNode<T>> queue = new LinkedList<>();
  queue.add(this.getRootNode());
- int breathSearchNiv = 1;
+ int breathSearchNiv = 0;
  TreeNode<T> currentNode = null;
  while (breathSearchNiv < index && !queue.isEmpty()) {
  currentNode = queue.poll();