devenum: Constify a variable

[Robert Shearman]

Andrew Talbot wrote:
>   */
>  static HRESULT WINAPI DEVENUM_IClassFactory_CreateInstance(
>      LPCLASSFACTORY iface,
> -    LPUNKNOWN pUnkOuter,
> +    const IUnknown *pUnkOuter,
>      REFIID riid,
>      LPVOID *ppvObj)
>   

I'm not sure what the point of this is.

-- 
Rob Shearman