test_options_parse: Do not use uintmax_t instead of LargestIntegralType

test_options_parse: Do not use uintmax_t instead of LargestIntegralType

At least on OpenBSD it seems that uintmax_t maps
to unsigned long long always, but LargestIntegralType
is unsigned long. So if we have a version of cmocka.h
that defines LargestIntegralType then respect that.

Change-Id: I59a49696acd665d43b21e5c23f24b86c15989cd6
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1256
Message-Id: <20251008133338.23652-1-gert@greenie.muc.de>
URL: https://sourceforge.net/p/openvpn/mailman/message/59243971/
Signed-off-by: Gert Doering <gert@greenie.muc.de>