Fix clone for double object

[tkulka]

Hello, prophecy has problem with cloned double object. Here is example:

class Foo
{
    private $object;

    public function __construct($object)
    {
        $this->object = clone $object;
    }

    public function getObject()
    {
        return $this->object;
    }
}

And spec tests:

class FooSpec extends ObjectBehavior
{
    public function it_compares_cloned_object()
    {
        $object = new \stdClass();
        $this->beConstructedWith($object);

        $this->getObject()->shouldBeLike($object);
    }

    public function it_compares_cloned_double_object(\stdClass $object)
    {
        $this->beConstructedWith($object);

        $this->getObject()->shouldBeLike($object);
    }
}

I expect the same behavior for two tests but first passed and second failed with error:

      - it compares cloned double object
      expected [obj:Double\stdClass\P1], but got [obj:Double\stdClass\P1].

      @@ -1,5 +1,5 @@
      -Double\stdClass\P1 Object &000000002e014a3e000000003f3f6471 (
      -    'objectProphecyClosure' => Closure Object &000000002e014a34000000003f3f6471 (
      -        0 => Closure Object &000000002e014a34000000003f3f6471
      +Double\stdClass\P1 Object &000000002e014a22000000003f3f6471 (
      +    'objectProphecyClosure' => Closure Object &000000002e014a3d000000003f3f6471 (
      +        0 => Closure Object &000000002e014a3d000000003f3f6471
           )
       )

Also I found the solution and I would like to shere with you.

[ciaranmcnulty]

Thanks for this @tkulka!