The map_add_domain VAT command accepts invalid arguments

In case EA bits length = 0 the PSID length > 0 isn't supported

tap_connect tapname tap_int0 mac 02:00:00:00:55:00
tap_connect tapname tap_int1 mac 02:00:00:00:55:01
sw_interface_set_flags sw_if_index 5 admin-up
sw_interface_set_flags sw_if_index 6 admin-up
sw_interface_add_del_address sw_if_index 5 2001:0::1/64
sw_interface_add_del_address sw_if_index 6 10.0.0.1/24
ip_add_del_route ::/0 via 2001:0::2 sw_if_index 5
ip_add_del_route 0.0.0.0/0 via 10.0.0.2 sw_if_index 6
ip_neighbor_add_del sw_if_index 5 dst 2001:0::2 mac 08:00:27:46:2b:4c
ip_neighbor_add_del sw_if_index 6 dst 10.0.0.2 mac 08:00:27:54:33:23

map_add_domain ip4-pfx 20.169.0.0/16 ip6-pfx 2001:db8:0000::/32 ip6-src 2001:db8:ffff::1 ea-bits-len 20 psid-offset 6 psid-len 8