Re: [PATCH 0/2] MR2573: dinput: Set guidType = GUID_Unknown for HID collections.

[Rémi Bernon (＠rbernon)]

The fix seems to make sense, I don't think any test showed that collections are supposed to have an actual GUID, and it was set with `object_usage_to_guid` mostly because the other objects are.

Regarding the test I think you can add an empty collection in `test_simple_joystick` instead, though you might have to adjust the expected descs accordingly.