hlr_ussd.c: fix: properly print a EUSE / IUSE name

We need to distinguish between both EUSE and IUSE, and properly
print their names. Otherwise, garbage is printed in case of IUSE.

Change-Id: I497e7c1fe41279afdb1256ee69e166066a6462bb
diff --git a/src/hlr_ussd.c b/src/hlr_ussd.c
index f9399d2..7b981bb 100644
--- a/src/hlr_ussd.c
+++ b/src/hlr_ussd.c
@@ -126,8 +126,10 @@
 	struct hlr_ussd_route *rt;
 	llist_for_each_entry(rt, &hlr->ussd_routes, list) {
 		if (!strncmp(ussd_code, rt->prefix, strlen(rt->prefix))) {
-			LOGP(DSS, LOGL_DEBUG, "Found EUSE %s (prefix %s) for USSD Code '%s'\n",
-				rt->u.euse->name, rt->prefix, ussd_code);
+			LOGP(DSS, LOGL_DEBUG, "Found %s '%s' (prefix '%s') for USSD "
+				"Code '%s'\n", rt->is_external ? "EUSE" : "IUSE",
+				rt->is_external ? rt->u.euse->name : rt->u.iuse->name,
+				rt->prefix, ussd_code);
 			return rt;
 		}
 	}