winscard: add pcsc-lite helpers for upcoming implementation

[Dan Kegel]

James wrote:
> This would be a lot cleaner as:
>
> if (!(liteSCardEstablishContext = (SCardEstablishContextPtr)
> wine_dlsym(g_pcscliteHandle,"SCardEstablishContext",szErr,sizeof(szErr)))
> {
>    ERR("Failed to get SCardEstablishContext from pcsclite library. Error = %s\n",szErr);
>    goto error;
> }

I think in C you can skip the cast from void *, can't you?  e.g.

liteSCardEstablishContext =
wine_dlsym(g_pcscliteHandle,"SCardEstablishContext",szErr,sizeof(szErr));
if (!liteSCardEstablishContext)
{
    ERR("Failed to get SCardEstablishContext from pcsclite library.
Error = %s\n",szErr);
    goto error;
}

-- 
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