Re: [PATCH 0/5] MR1733: mshtml/jscript/vbscript: Implement SID_GetCaller and misc fixes.

[Nikolay Sivov (＠nsivov)]

Nikolay Sivov (@nsivov) commented about dlls/vbscript/vbdisp.c:
>  if(pvarRes)
>      V_VT(pvarRes) = VT_EMPTY;
>
> - return invoke_vbdisp(This, id, wFlags, TRUE, pdp, pvarRes);
> - prev_caller = This->desc->ctx->vbcaller->caller;
> - This->desc->ctx->vbcaller->caller = pspCaller;
> - if(pspCaller)
> -
>    IServiceProvider_AddRef(pspCaller);
> -
> - hres = invoke_vbdisp(This, id, wFlags, TRUE, pdp, pvarRes);
> -
> - This->desc->ctx->vbcaller->caller = prev_caller;
> - if(pspCaller)
> -
>    IServiceProvider_Release(pspCaller);
> - return hres;

Why do you need to do addref/release?