[PATCH 0/2] MR10855: oleaut32: Don't fake IDispatch inheritance for TKIND_DISPATCH without an impl type.

[Francis De Brabandere (＠francisdb)]

GetTypeAttr unconditionally inflated cFuncs by the IDispatch vtbl
size and GetRefTypeOfImplType(0) returned dispatch_href, even for
typeinfos created via ICreateTypeLib2 without AddImplType. In that
case dispatch_href is -1, so callers that walked GetRefTypeOfImplType
chains followed an invalid href. Only inflate cFuncs when an impl
type is registered, and only return dispatch_href when the typelib
actually has an IDispatch reference.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/10855