[libgee] Increase stamp on Map.set in Gee.TreeMap

[Maciej Marcin Piechotka <mpiechotka src gnome org>]

commit 6c93460e6a01d4727657f50604e3d0cc7ea448d0
Author: Maciej Piechotka <uzytkownik2 gmail com>
Date:   Sun Aug 1 16:34:56 2010 +0200

    Increase stamp on Map.set in Gee.TreeMap

 gee/treemap.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gee/treemap.vala b/gee/treemap.vala
index 90ddeca..cbd156f 100644
--- a/gee/treemap.vala
+++ b/gee/treemap.vala
@@ -221,6 +221,7 @@ public class Gee.TreeMap<K,V> : Gee.AbstractMap<K,V> {
 	public override void set (K key, V value) {
 		set_to_node (ref root, key, value, null, null);
 		root.color = Node.Color.BLACK;
+		stamp++;
 	}
 
 	private void move_red_left (ref Node<K, V> root) {