d3drm/tests: Release two retrieved interfaces to allow proper cleanup.

[Bernhard Übelacker]

Am 16.10.2015 um 13:00 schrieb Stefan Dösinger:
> Are these necessary? I'd expect the frame children to be detached when
> their parent is destroyed, similarly to how it works in ddraw.

Thanks for your time.
You are right. To get these released the explicit DeleteChild is not 
neccessary. (I first added these but later failed to realize that I do 
not need them anymore.)

Should I send a changed patch for it?

Kind regards,
Bernhard