Description:
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ReflectionMethod::getNumberOfRequiredParameters() returns 1 for MultipleIterator::__construct() whereas it should return 0.

See: https://secure.php.net/manual/en/class.reflectionmethod.php

Test script:
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<?php
$rm = new ReflectionMethod('MultipleIterator','__construct');
var_dump($rm->getNumberOfParameters());
var_dump($rm->getNumberOfRequiredParameters());

Expected result:
----------------
int(1)
int(0)

Actual result:
--------------
int(1)
int(1)