Description:
------------
Object oriented style mysqli->connect_error string always null even when a connection error occurs. Tried with bogus host name, bogus user name, bogus password, and bogus schemata...result always the same (mysqli->connect_error is NULL). Note: Procedural style always returns expected string value. 

Installed PHP with Windows Installer, Apache 2.2 Module and the following extensions: BZ2, MCRYPT, MHASH, MYSQLI, PDO, TIDY, XMLRPC, XSL and ZIP.

Reproduce code:
---------------
<?php
$mysqli = new mysqli("bogushost", "username", "password", "schemata");

$connecterror = "Object oriented style mysqli->connect_error string: ".$mysqli->connect_error."</br>";
echo $connecterror;

printf("Proceedural style mysqli_connect_error string: %s\n", mysqli_connect_error()."</br>");

/* check connection never works*/
if ($mysqli->connect_error()) {
	printf("Connect failed: %s\n", mysqli_connect_error()."</br>");
    exit();
}

/* close connection */
$mysqli->close();
?>

Expected result:
----------------
Object oriented style mysqli->connect_error string: Unknown MySQL server host 'bogus' (11001)
Proceedural style mysqli_connect_error string: Unknown MySQL server host 'bogus' (11001)
Connect failed: Unknown MySQL server host 'bogus' (11001)


Actual result:
--------------
Object oriented style mysqli->connect_error string:
Proceedural style mysqli_connect_error string: Unknown MySQL server host 'bogus' (11001)