Description:
------------
I am working with socket streams and the XMPP protocol.
In a while it happens that a connection has to be replaced with a new one.
This can be done with sending the root node again to the server, and the server 
then replies with a new root node too.

This root node includes the XML declaration (<?xml ... ?>), but apparently the 
parser seems to stop at that point, where a new XML declaration occurs.

So I have to filter those strings out manually, that's not the expected behavior 
I wished to have.

This has been tested with PHP 5.3.5 and 5.3.9

Test script:
---------------
<?php
$p = xml_parser_create();
xml_set_element_handler($p, 'open', 'close');

function open($p, $tag) {
  echo "opened tag $tag\n";
}

function close($p, $tag) {
  echo "closed tag $tag\n";
}

$xml = "<?xml version='1.0' ?><stream><tag></tag>";
$xml2 = '</stream>';

xml_parse($p, $xml);
xml_parse($p, $xml);
xml_parse($p, $xml2);

Expected result:
----------------
opened tag STREAM
opened tag TAG
closed tag TAG
opened tag STREAM
opened tag TAG
closed tag TAG
closed tag STREAM

Actual result:
--------------
opened tag STREAM
opened tag TAG
closed tag TAG