ALT tag for WPML language flags

I realise it’s only small, but I thought I’d pass it on in case it’s worth adding to the next update… The (built-in) WPML Language switcher icons are missing the ALT tag.

As far as I can see the fix is simple – WPML/config.php line:260 can be changed from:
$output .= " <span class='language_flag'><img title='".$lang['native_name']."' src='".$lang['country_flag_url']."' /></span>";

to:

$output .= " <span class='language_flag'><img title='".$lang['native_name']."' alt='".$lang['native_name']."' src='".$lang['country_flag_url']."' /></span>";