re: bug#563. checking in some commented out trace code and a fix so that the in testalpha.c the background only flashes when alpha == 255. The problem that is being

fixed is caused by clearing SDL_COPY_RLE_COLORKEY without setting SDL_COPY_RLE_DESIRED in SDL_UnRELSurface.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%402746

src/video/SDL_renderer_gl.c

@@ -947,7 +947,7 @@ GL_DestroyRenderer(SDL_Renderer * renderer)
 
     if (data) {
         if (data->context) {
-            SDL_GL_MakeCurrent(0, NULL);
+            /* SDL_GL_MakeCurrent(0, NULL); *//* doesn't do anything */
             SDL_GL_DeleteContext(data->context);
         }
         SDL_free(data);