Fixed scaling YUV surfaces

src/video/SDL_surface.c

@@ -2227,7 +2227,7 @@ SDL_Surface *SDL_ScaleSurface(SDL_Surface *surface, int width, int height, SDL_S
 
     if (SDL_ISPIXELFORMAT_FOURCC(surface->format)) {
         // We can't directly scale a YUV surface (yet!)
-        SDL_Surface *tmp = SDL_CreateSurface(surface->w, surface->h, SDL_PIXELFORMAT_ARGB8888);
+        SDL_Surface *tmp = SDL_ConvertSurface(surface, SDL_PIXELFORMAT_ARGB8888);
         if (!tmp) {
             return NULL;
         }
@@ -2237,10 +2237,9 @@ SDL_Surface *SDL_ScaleSurface(SDL_Surface *surface, int width, int height, SDL_S
         if (!scaled) {
             return NULL;
         }
-        tmp = scaled;
 
-        SDL_Surface *result = SDL_ConvertSurfaceAndColorspace(tmp, surface->format, NULL, surface->colorspace, surface->props);
-        SDL_DestroySurface(tmp);
+        SDL_Surface *result = SDL_ConvertSurfaceAndColorspace(scaled, surface->format, NULL, surface->colorspace, surface->props);
+        SDL_DestroySurface(scaled);
         return result;
     }