Description:
------------
When attempting to create an XML parser using xml_parser_create_ns and parsing the structure using xml_parse_into_struct an error is thrown.

My configure settings

'./configure' '--enable-versioning' '--enable-memory-limit' '--with-layout=GNU' '--with-config-file-scan-dir=/usr/local/etc/php' '--disable-all' '--with-regex=php' '--with-apxs2=/usr/local/sbin/apxs' '--prefix=/usr/local' 'i386-portbld-freebsd5.4'

XML Support 	active
XML Namespace Support 	active
EXPAT Version 	expat_1.95.8

When running the same code on Windows XP the expected result is returned sucessfully.

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

$sData = "<my:object name='__root'>%3Chtml%3E%0A%3Chead%3E%0A%3Ctitle%3E<my:variable name='Test'/>%3C%2Ftitle%3E%0A%0A%3C%2Fhead%3E%0A%3Cbody%3E%0A%0A%3C%2Fbody%3E%0A%3C%2Fhtml%3E%0A</my:object>";
$xml_parser = xml_parser_create_ns();

if (!xml_parse_into_struct($xml_parser, $sData, $aVals, $aIndex))
	{
	$nErrorCode = xml_get_error_code($xml_parser);
	$sError = xml_error_string($nErrorCode);
	$sErrorMessage = 'XML Parser Error: Error Code: ' . $nErrorCode . ' Error String: ' . $sError . ' Line Number: ' . xml_get_current_line_number($xml_parser);
	trigger_error($sErrorMessage, E_USER_WARNING);		
	}
		
echo "<PRE>";
print_r($aVals);
echo "</PRE>";

?>

Expected result:
----------------
Array
  (
  [0] => Array
    (
    [tag] => MY:OBJECT
    [type] => open
    [level] => 1
    [attributes] => Array
      (
      [NAME] => __root
      )

    [value] => %3Chtml%3E%0A%3Chead%3E%0A%3Ctitle%3E
   )

  [1] => Array
    (
    [tag] => MY:VARIABLE
    [type] => complete
    [level] => 2
    [attributes] => Array
      (
      [NAME] => Test
      )

    )

  [2] => Array
    (
    [tag] => MY:OBJECT
    [value] => %3C%2Ftitle%3E%0A%0A%3C%2Fhead%3E%0A%3Cbody%3E%0A%0A%3C%2Fbody%3E%0A%3C%2Fhtml%3E%0A
    [type] => cdata
    [level] => 1
    )

  [3] => Array
    (
    [tag] => MY:OBJECT
    [type] => close
    [level] => 1
    )
  )

Actual result:
--------------
Warning: XML Parser Error: Error Code: 27 Error String: unbound prefix Line Number: 1 in /usr/local/www/data-dist/xml/test.php on line 11