Don't use hardware overlay by default (seems much faster this way)

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40812

src/video/windx5/SDL_dx5yuv.c

@@ -35,7 +35,7 @@ static char rcsid =
 #include "SDL_dx5yuv_c.h"
 #include "SDL_yuvfuncs.h"
 
-#define USE_DIRECTX_OVERLAY
+//#define USE_DIRECTX_OVERLAY
 
 /* The functions used to manipulate software video overlays */
 static struct private_yuvhwfuncs dx5_yuvfuncs = {