add column 'last_lu_rat', show last RAN type

Change-Id: I5d73b1d928b61175d3198326706b7f49ba50e16f
diff --git a/src/hlr_vty_subscr.c b/src/hlr_vty_subscr.c
index de78ef9..8c3ef2b 100644
--- a/src/hlr_vty_subscr.c
+++ b/src/hlr_vty_subscr.c
@@ -89,6 +89,8 @@
 		vty_out(vty, "    PS purged%s", VTY_NEWLINE);
 	if (subscr->last_lu_seen)
 		vty_out(vty, "    last LU seen: %s%s", get_datestr(&subscr->last_lu_seen), VTY_NEWLINE);
+	if (subscr->last_lu_rat[0])
+		vty_out(vty, "    last LU RAT: %s%s", subscr->last_lu_rat, VTY_NEWLINE);
 	for (i = OSMO_RAT_UNKNOWN + 1; i < ARRAY_SIZE(subscr->rat_types); i++) {
 		vty_out(vty, "    %s: %s%s", osmo_rat_type_name(i), subscr->rat_types[i] ? "allowed" : "forbidden",
 			VTY_NEWLINE);