ovn-northd: Fix memory leak in case of duplicate logical router port.

'lrp_networks' must be destroyed on error path.

Fixes: 8e83e56 ("ovn: Support multiple addresses on a single logical router port.")
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Signed-off-by: Numan Siddique <numans@ovn.org>

northd/ovn-northd.c

@@ -2129,6 +2129,7 @@ join_logical_ports(struct northd_context *ctx,
                             = VLOG_RATE_LIMIT_INIT(5, 1);
                         VLOG_WARN_RL(&rl, "duplicate logical router port %s",
                                      nbrp->name);
+                        destroy_lport_addresses(&lrp_networks);
                         continue;
                     }
                     ovn_port_set_nb(op, NULL, nbrp);