Re: [01/18] windowscodecs: Do not assume that vtable is the first element of the object.

[Dmitry Timoshkov]

Vincent Povirk  wrote:
> I disagree with many of the choices in this series (for example, I
> think casting an interface pointer to an inherited interface is fine,
> and replacing that with QueryInterface just adds unnecessary
> additional logic), but I don't think any semantics have been changed
> and overall it's a good cleanup.

Please also consider that many of the objects may be implemented by
a someone's else codec dll, and relying on an implementation detail
is not acceptable in that case.