otime: Fix various conversion warnings

otime: Fix various conversion warnings

Generally just use better types. Use typedef
to handle the Win32 situation where tv_sec
is long which is smaller than time_t (which
is long long).

Change-Id: Ie22f4902162b7004542f030c734b968de71e0e9e
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1274
Message-Id: <20251116135757.15805-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg34462.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>