This isn't necessary because we do not use libpng to read metadata
or verify checksums. If this happens to be the last thing we do,
it will fail the pngformat tests which do not expect us to return
with the stream seeked to the end of the file.
Signed-off-by: Esme Povirk <esme@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>