socket: Avoid conversion warning in get_addr_generic

socket: Avoid conversion warning in get_addr_generic

We already check earlier that bits is smaller that
max_bits, so the cast is safe.

While reviewing the callers, remove some unused
variables.

Change-Id: I5ad13bc6674b3403251cc552d1f2c0f057431817
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1475
Message-Id: <20260119122556.15225-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg35324.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>