devenum: Constify a variable

[Robert Shearman]

Andrew Talbot wrote:
> Robert Shearman wrote:
>
>   
>> 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.
>>
>>     
>
> I'm just naively declaring that this function does not change the object to
> which this pointer points. Why do you consider it might be pointless in
> this case?
>   

No code should be using the lpVtbl parameter directly (functions in it 
can be called using macros). Any code doing so is buggy, but I think 
you'll find it very difficult to make every parameter that uses COM 
objects const.

-- 
Rob Shearman