[gnome-games] quadrapassel: Fix crash starting with 'show blocks' feature

[Robert Ancell <rancell src gnome org>]

commit 8fb495dc66b074f7f2c4f88b7e914f81be8fa3b7
Author: Robert Ancell <robert ancell canonical com>
Date:   Mon Feb 6 19:49:21 2012 +1100

    quadrapassel: Fix crash starting with 'show blocks' feature

 quadrapassel/src/game-view.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/quadrapassel/src/game-view.vala b/quadrapassel/src/game-view.vala
index 0ae2ee6..81a96ff 100644
--- a/quadrapassel/src/game-view.vala
+++ b/quadrapassel/src/game-view.vala
@@ -160,7 +160,7 @@ public class GameView : GtkClutter.Embed
     
     private void update_shadow ()
     {
-        if (show_shadow)
+        if (game != null && show_shadow)
         {
             if (shape_shadow == null)
             {