Patch from Martin Lange (mala-sdl at hotmail.com) to unregister SDL's win32 windowclass when shutting down the video subsystem...this allows you to safely unload/reload the SDL shared library on Windows between initializations. Discussion is here: http://www.devolution.com/pipermail/sdl/2005-February/067424.html

--- a/src/video/windx5/SDL_dx5video.c	Tue Sep 27 08:36:28 2005 +0000
+++ b/src/video/windx5/SDL_dx5video.c	Tue Sep 27 09:00:42 2005 +0000
@@ -2387,6 +2387,7 @@
 	DIB_QuitGamma(this);
 	if ( SDL_Window ) {
 		DX5_DestroyWindow(this);
+		SDL_UnregisterApp();
 		FlushMessageQueue();
 	}