ofp-actions: Avoid buffer overread in BUNDLE action decoding.

Reported-at: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9052
Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Justin Pettit <jpettit@ovn.org>
parse_SET_VLAN_PCP(char *arg, struct ofpbuf *ofpacts,
                   enum ofputil_protocol *usable_protocols OVS_UNUSED)
{
    return parse_set_vlan_pcp(arg, ofpacts, false);
}

parse_SET_VLAN_PCP(char *arg, struct ofpbuf *ofpacts,
                   enum ofputil_protocol *usable_protocols OVS_UNUSED)
{
    return parse_set_vlan_pcp(arg, ofpacts, false);
}
