From 7460452b2631efb3e301c392490ca3c5a0a610ad Mon Sep 17 00:00:00 2001
From: "Stefanos A." <stapostol@gmail.com>
Date: Tue, 1 Oct 2013 22:13:33 +0200
Subject: [PATCH] MakeCurrent(null) should make context non-current

This fixes the crash in the "GameWindow Threading" example.
---
 Source/OpenTK/Platform/SDL2/Sdl2GraphicsContext.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Source/OpenTK/Platform/SDL2/Sdl2GraphicsContext.cs b/Source/OpenTK/Platform/SDL2/Sdl2GraphicsContext.cs
index fb6cd0e5..d004f93e 100644
--- a/Source/OpenTK/Platform/SDL2/Sdl2GraphicsContext.cs
+++ b/Source/OpenTK/Platform/SDL2/Sdl2GraphicsContext.cs
@@ -178,7 +178,7 @@ namespace OpenTK.Platform.SDL2
         public override void MakeCurrent(IWindowInfo window)
         {
             var sdl_window = window as Sdl2WindowInfo;
-            if (SDL.SDL_GL_MakeCurrent(sdl_window.Handle, SdlContext.Handle) < 0)
+            if (SDL.SDL_GL_MakeCurrent(sdl_window != null ? sdl_window.Handle : IntPtr.Zero, SdlContext.Handle) < 0)
             {
                 Debug.Print("SDL2 MakeCurrent failed with: {0}", SDL.SDL_GetError());
             }