core.sys.windows.com.ComObject apparently has wrongly laid out Vtable

[Kagamin]

You incorrectly declared the interface variable. Try this:
```
     auto COMobject = new com.ComObject();
     //auto COMobject = new ComObject();
     IUnknown ip = COMobject;
     writeln(COMobject.count);
     writeln("       ip vtable: ", ip.lpVtbl);
     auto vtable = COMobject.__vptr;
     writeln("COMobject vtable: ", vtable);
     writeln("ip &AddRef: ", &ip.lpVtbl.AddRef);
     writeln("ip offset: ", cast(void*)&ip.lpVtbl.AddRef - 
cast(void*)ip.lpVtbl);
     auto ipaddref = cast(void*)ip.lpVtbl.AddRef;
     writeln("       ip AddRef: ", ipaddref);
     auto addref = cast(void*)(&COMobject.AddRef).funcptr;
     writeln("COMobject AddRef: ", addref);
     writeln("COMobject AddRef : ip AddRef offset: ", addref - 
ipaddref);
     COMobject.AddRef();
     writeln(COMobject.count);
     ip.lpVtbl.AddRef(ip);
     writeln(COMobject.count);
```