find_core_update( string $version, string $locale )

function find_core_update( $version, $locale ) {
	$from_api = get_site_transient( 'update_core' );

	if ( ! isset( $from_api->updates ) || ! is_array( $from_api->updates ) )
		return false;

	$updates = $from_api->updates;
	foreach ( $updates as $update ) {
		if ( $update->current == $version && $update->locale == $locale )
			return $update;
	}
	return false;
}