Description:
------------
If you extend a class with mysqli (using the mysqlnd driver) and try to connect to the database, php produces strange error messages.
PHP 5.3.0alpha3-dev (cli) (built: Nov 23 2008 12:06:30) 
and --with-mysqli=mysqlnd

In php 5.2 and lower this test class works perfect.

Reproduce code:
---------------
<?php

class a extends mysqli
{
        public function __construct() {
                $dbParam = array ('DB_HOST' => 'localhost',
                                  'DB_USER' => 'db',
                                  'DB_PASS' => '',
                                  'DB_NAME' => 'test'
                                 );
                $this->init();
                $this->options(MYSQLI_OPT_CONNECT_TIMEOUT, 1);

                $this->real_connect(    $dbParam['DB_HOST'],
                                                        $dbParam['DB_USER'],
                                                        $dbParam['DB_PASS'],
                                                        $dbParam['DB_NAME']);
        }
}


$mysqli = new a();
printf ("Connection: %s\n.", $mysqli->host_info);
$mysqli->close();
?>

Expected result:
----------------
should work like in php5.2

Actual result:
--------------
Warning: mysqli::options() [mysqli.options]: Couldn't fetch a in test.php on line 31
Warning: mysqli::real_connect() [mysqli.real-connect]: Couldn't fetch test.php on line 41