odbccp32: Implement SQLGetPrivateProfileString (try 5)

[Nikolay Sivov]

> +    sect = heap_strdupAtoW(lpszSection);
> +    entry = heap_strdupAtoW(lpszEntry);
> +    string = heap_strdupAtoW(lpszDefault);
> +    file = heap_strdupAtoW(lpszFilename);
> +    retval = heap_alloc(cbRetBuffer*sizeof(WCHAR));
> +
> +    ret = SQLGetPrivateProfileStringW(sect, entry, string, retval, cbRetBuffer, file);
> +    if(ret)
> +    {
> +        WideCharToMultiByte(CP_ACP, 0, retval, -1, RetBuffer, cbRetBuffer, NULL, NULL);
> +        RetBuffer[ret] = 0;
> +    }
> +
> +    heap_free(sect);
> +    heap_free(entry);
> +    heap_free(string);
> +    heap_free(file);
> +
> +    heap_free(retval);

Structurally it's fine, but you're using WCHAR count as CP_ACP char 
count, and it's wrong assumption in general.