Bug in Zend\Stdlib\PriorityList->valid()

[ha-sash]

Mistake in logic of check of the current value.
If the item contains FALSE that PriorityList->valid () will return FALSE.

    // foreach behaves incorrectly
    public function valid()
    {
        return ($this->current() !== false);
    }

    //foreach behaves correctly
    public function valid()
    {
        return (current($this->items) !== false);
    }

[samsonasik]

duplicate with #6768 , please close this.