Re: gdiplus: Reuse an existing image stream in GdipImageSelectActiveFrame.

[Vincent Povirk]

> @@ -3898,7 +3894,7 @@ GpStatus WINGDIPAPI GdipImageSelectActiveFrame(GpImage *image, GDIPCONST GUID *d
>          return Ok;
>      }
> - IStream_Release(stream);
> - IStream_Release(image->stream);
> return stat;
>
> }

I don't think it's necessary to AddRef/Release the stream anymore in
GdipImageSelectActiveFrame. Creating the new image and freeing the old
one will update the refcount as necessary. And it's a bit confusing
since technically the current image->stream is released by
free_image_data then overwritten (with the same value, fortunately) by
copying new_image to image.

Looks good otherwise.