Fix StyleCop warnings in OpenRA.Renderer.Sdl2

OpenRA.Renderer.Sdl2/ErrorHandler.cs

@@ -56,9 +56,12 @@ namespace OpenRA.Renderer.Sdl2
 			Log.Write("graphics",  "Vendor: {0}", GL.GetString(StringName.Vendor));
 			if (GL.GetString(StringName.Vendor).Contains("Microsoft"))
 			{
-				Log.Write("graphics", "Note:  The default driver provided by Microsoft does not include full OpenGL support.\n"
-					+ "Please install the latest drivers from your graphics card manufacturer's website.\n");
+				var msg = "";
+				msg += "Note:  The default driver provided by Microsoft does not include full OpenGL support.\n";
+				msg += "Please install the latest drivers from your graphics card manufacturer's website.\n";
+				Log.Write("graphics", msg);
 			}
+
 			Log.Write("graphics",  "Renderer: {0}", GL.GetString(StringName.Renderer));
 			Log.Write("graphics",  "GL Version: {0}", GL.GetString(StringName.Version));
 			Log.Write("graphics",  "Shader Version: {0}", GL.GetString(StringName.ShadingLanguageVersion));

OpenRA.Renderer.Sdl2/Sdl2GraphicsDevice.cs

@@ -157,11 +157,13 @@ namespace OpenRA.Renderer.Sdl2
 				SDL.SDL_GL_DeleteContext(context);
 				context = IntPtr.Zero;
 			}
+
 			if (window != IntPtr.Zero)
 			{
 				SDL.SDL_DestroyWindow(window);
 				window = IntPtr.Zero;
 			}
+
 			SDL.SDL_Quit();
 		}
 

OpenRA.Renderer.Sdl2/Texture.cs

@@ -34,6 +34,7 @@ namespace OpenRA.Renderer.Sdl2
 			{
 				return scaleFilter;
 			}
+
 			set
 			{
 				if (scaleFilter == value)