Description:
------------
When I try to parse XML into struct twice using the same parser - second attempt fails.

Reproduce code:
---------------
<?php
$t=('../test/eg_snews.xml'); // any XML file

      $XMLContent = file_get_contents($t);

      $th = xml_parser_create(); 

		echo "<hr>";
      var_dump(xml_parse_into_struct ($th, $XMLContent, $V)); ;
      echo "<br>Result size: ".sizeof($V);
		echo "<br>Error code: ".$ec=xml_get_error_code($th);
  		echo "<br>Error text: ".xml_error_string($ec);      

		echo "<hr>";
      var_dump(xml_parse_into_struct ($th, $XMLContent, $V)); ;
      echo "<br>Result size: ".sizeof($V);
		echo "<br>Error code: ".$ec=xml_get_error_code($th);
  		echo "<br>Error text: ".xml_error_string($ec);      
?>

Expected result:
----------------
int(1) 
Result size: 301
Error code: 0
Error text: 

int(1) 
Result size: 301
Error code: 0
Error text: 

Actual result:
--------------
int(1) 
Result size: 301
Error code: 0
Error text: 

int(0) 
Result size: 0
Error code: 9
Error text: junk after document element