fix trailing whitespace everywhere

OpenRA.Renderer.SdlCommon/SdlGraphics.cs

@@ -1,7 +1,7 @@
 #region Copyright & License Information
 /*
 * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
-* This file is part of OpenRA, which is free software. It is made 
+* 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,
 * see COPYING.
@@ -83,7 +83,7 @@ namespace OpenRA.Renderer.SdlCommon
 					.F(string.Join(",", missingExtensions)));
 				throw new InvalidProgramException("Unsupported GPU. See graphics.log for details.");
 			}
-			
+
 			return surf;
 		}
 	}