Only show 'About this version' menu item to logged in users.

git-svn-id: http://svn.automattic.com/wordpress/trunk@18777 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/admin-bar.php

@@ -81,6 +81,7 @@ function wp_admin_bar_wp_menu( $wp_admin_bar ) {
 		),
 	) );
 
+	if ( is_user_logged_in() ) {
 		// Add "About This Version" link
 		$wp_admin_bar->add_menu( array(
 			'parent' => 'wp-logo',
@@ -88,6 +89,7 @@ function wp_admin_bar_wp_menu( $wp_admin_bar ) {
 			'title'  => __('About This Version'),
 			'href'   => admin_url('about.php'),
 		) );
+	}
 
 	// Add codex link
 	$wp_admin_bar->add_menu( array(