networking_iproute2: don't pass M_WARN to openvpn_execve_check()

networking_iproute2: don't pass M_WARN to openvpn_execve_check()

openvpn_execve_check() expects a set of flags as third argument and not
a loglevel. For this reason, if no FATAL behaviour is expected, we
should simply pass 0. openvpn_execve_check() will then pick the
appropriate loglevel on its own.

Signed-off-by: Antonio Quartulli <a@unstable.cc>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20220407201411.22486-1-a@unstable.cc>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg24090.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>