Silences a valgrind warning:
==640== Conditional jump or move depends on uninitialised value(s)
==640== at 0x808E623: run (ofproto-dpif.c:1444)
==640== by 0x8086593: ofproto_run (ofproto.c:755)
==640== by 0x806EB80: bridge_run (bridge.c:1397)
==640== by 0x806F66C: main (ovs-vswitchd.c:90)
port->bundle = NULL;
port->cfm = NULL;
port->tag = tag_create_random();
+ port->may_enable = true;
if (ofproto->sflow) {
dpif_sflow_add_port(ofproto->sflow, port->odp_port,