global $wp_current_db_version;

	if ( $wp_current_db_version < 6689 ) {
		populate_roles_250();
	}

}

/**
 * Execute changes made in WordPress 2.5.2.
 *
 * @ignore
 * @since 2.5.2
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 */
function upgrade_252() {
	global $wpdb;

	$wpdb->query( "UPDATE $wpdb->users SET user_activation_key = ''" );
}

/**
 * Execute changes made in WordPress 2.6.
 *
 * @ignore
 * @since 2.6.0
 *
 * @global int $wp_current_db_version