fix VoxelAnimation.DisableFunc being ignored

OpenRA.Game/Graphics/VoxelRenderable.cs

@@ -1,6 +1,6 @@
 #region Copyright & License Information
 /*
- * Copyright 2007-2013 The OpenRA Developers (see AUTHORS)
+ * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
  * This file is part of OpenRA, which is free software. It is made
  * available to you under the terms of the GNU General Public License
  * as published by the Free Software Foundation. For more information,
@@ -89,8 +89,10 @@ namespace OpenRA.Graphics
 		static readonly float[] groundNormal = new float[] {0,0,1,1};
 		public void BeforeRender(WorldRenderer wr)
 		{
+			var draw = voxels.Where(v => v.DisableFunc == null || !v.DisableFunc());
+
 			renderProxy = Game.Renderer.WorldVoxelRenderer.RenderAsync(
-				wr, voxels, camera, scale, groundNormal, lightSource,
+				wr, draw, camera, scale, groundNormal, lightSource,
 				lightAmbientColor, lightDiffuseColor,
 			    palette, normalsPalette, shadowPalette);
 		}