[gnome-games] chess: Fix crash starting new game when viewing history of a previous one

[Robert Ancell <rancell src gnome org>]

commit f094fd7c31761c1adeb33efd6455282188dbca35
Author: Robert Ancell <robert ancell canonical com>
Date:   Sat Feb 19 18:07:56 2011 +1100

    chess: Fix crash starting new game when viewing history of a previous one

 glchess/src/chess-scene.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/glchess/src/chess-scene.vala b/glchess/src/chess-scene.vala
index 36eb187..8fd38ff 100644
--- a/glchess/src/chess-scene.vala
+++ b/glchess/src/chess-scene.vala
@@ -75,6 +75,7 @@ public class ChessScene : Object
         set
         {
             _game = value;
+            _move_number = -1;
             selected_rank = -1;
             selected_file = -1;
             _game.moved.connect (moved_cb);