[gnome-chess] Revert "Do not use Gtk.Widget.double_buffered"

[Michael Catanzaro <mcatanzaro src gnome org>]

commit b59712356bb5b142ccfa0abbfa648a67183f82ec
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Jun 24 23:09:48 2014 -0500

    Revert "Do not use Gtk.Widget.double_buffered"
    
    This reverts commit 3fe468cb26a6ed36b92afdd130d5ca272f4d859a.
    
    It works again (in X - it still won't work under Wayland).

 src/chess-view-3d.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/chess-view-3d.vala b/src/chess-view-3d.vala
index 285268f..69eed3b 100644
--- a/src/chess-view-3d.vala
+++ b/src/chess-view-3d.vala
@@ -81,6 +81,7 @@ private class ChessView3D : ChessView
         black_piece_color = { 0.62f * 0.7f, 0.45f * 0.7f, 0.28f * 0.7f, 1.0f };
         black_piece_specular = { 0.62f, 0.45f, 0.28f, 1.0f };
 
+        double_buffered = false;
         try
         {
             pawn_model = new TDSModel (File.new_for_path (Path.build_filename (PKGDATADIR, "pieces", "3d", 
"pawn.3ds", null)));