Description:
------------
The namespace handler defined with the xml_set_start_namespace_decl_handler() function is never called.

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

$xml = '<addressbook xmlns:ab="http://www.somewhere.com/addressbook/" />';

$parser = xml_parser_create_ns();
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);

/* The handler doesn't get called for some reason */
xml_set_start_namespace_decl_handler( $parser, "NSHandler" );

xml_set_element_handler( $parser, 'StartHandler', 'EndHandler' );
xml_parse( $parser, $xml, true);
xml_parser_free( $parser );


function StartHandler( $parser, $name, $attrs ) {
   print( "StartHandler Called<br/>" );
}


function EndHandler( $parser, $name ) {
   print( 'EndHandler Called<br/>' );
}


function NSHandler( $parser, $prefix, $uri ) {
   print( 'NSHandler Called<br/>' );
}

function DefaultHandler( $parser, $data ) {
   print( 'DefaultHandler Called<br/>' );
}
?>

Expected result:
----------------
NSHandler Called
StartHandler Called
EndHandler Called


Actual result:
--------------
StartHandler Called
EndHandler Called