Determines whether this site has more than one author.

Checks to see if more than one author has published posts.

For more information on this and similar theme functions, check out
the {@link Conditional Tags} article in the Theme Developer Handbook.

function is_multi_author() {
	global $wpdb;

	$is_multi_author = get_transient( 'is_multi_author' );
	if ( false === $is_multi_author ) {
		$rows            = (array) $wpdb->get_col( "SELECT DISTINCT post_author FROM $wpdb->posts WHERE post_type = 'post' AND post_status = 'publish' LIMIT 2" );
		$is_multi_author = 1