Description:
------------
Problem with extension of mysqli library.

Reproduce code:
---------------
<?php
//loaded mysql via dl() function  
$server = 'localhost'; $dbname = 'ws_matching';  $username = 'root';  $password = '';  $port = 3306; $socket = '/tmp/mysql.sock';
class example_mysqli extends mysqli{
  function query($query){
    $result = parent::query($query);
    if(mysqli_error($this)){
      throw new exception(mysqli_error($this), mysqli_errno($this));
    }
    return $result;
  }
}
//$my = new mysqli($server,$username,$password,$dbname,$port,$socket); //works properly
$my = new example_mysqli($server,$username,$password, $dbname,$port,$socket);   //gives strange errors
$result = $my->query('SELECT * FROM housesnl_demand');
while($row = $result->fetch_row()){
  print_r($row);
}
$result->close();
$my->close();
?>

Expected result:
----------------
Array ( [0] => 2006-09-25 12:09:58 )

Actual result:
--------------
possible fatal errors:

Fatal error: mysqli_stmt::data_seek() must be derived from example_mysqli::data_seek in Unknown on line 0

Fatal error: mysqli_stmt::bind_param() must be derived from example_mysqli::bind_param in Unknown on line 0


Warning: Wrong parameter count for mysqli_stmt::mysqli_stmt() in /mnt/data/home/rob/public_html/MatchingRevised/strange_error_mysqli.php on line 19


Fatal error: Call to undefined method mysqli_warning::query() in /mnt/data/home/rob/public_html/MatchingRevised/strange_error_mysqli.php on line 11

etc... error changes