Updated Rank Check

/**
 * Have Ranks
 * Checks if there are any registered rank.
 * @returns (bool) true or false
 * @since 1.1
 * @version 1.2
 */
if ( !function_exists( 'mycred_have_ranks' ) ) {
    function mycred_have_ranks() {
        $data = get_transient( 'mycred_ranks' );

        if ( $data == 0 ) {
            delete_transient( 'mycred_ranks' );
            $data = false;
        }

        if ( $data === false ) {
            global $wpdb;
            $data = $wpdb->get_var( "SELECT COUNT(*) FROM {$wpdb->posts} WHERE post_type = 'mycred_rank';" );
            set_transient( 'mycred_ranks', $data, DAY_IN_SECONDS * 7 );
        }

        if ( $data > 0 ) return true;
        return false;
    }
}