ssl: Clean up type handling in parse_early_negotiation_tlvs()

ssl: Clean up type handling in parse_early_negotiation_tlvs()

buf_read_u16 does not return uint16_t.

Change-Id: Ie7ad637223c332f7611c09b20a8d7a3a92d97ec7
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1302
Message-Id: <20251116215433.29257-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg34487.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>