DCOM: Fix Ref Counting in StdMarshalImpl_MarshalInterface

[Robert Shearman]

Robert Shearman wrote:

> Changelog:
>
> Mike Hearn <mh at codeweavers.com>
> Fix ref counting in StdMarshalImpl_MarshalInterface for case where the 
> stub already exists.
>
>Index: wine/dlls/ole32/compobj_private.h
>===================================================================
>RCS file: /home/wine/wine/dlls/ole32/compobj_private.h,v
>retrieving revision 1.14
>
Oops. Wrong patch.

Rob