destroy handle on bad authenticate

src/mod/endpoints/mod_sofia/sofia.c

@@ -890,6 +890,18 @@ void sofia_event_callback(nua_event_t event,
 		break;
 	case nua_i_subscribe:
 		sofia_presence_handle_sip_i_subscribe(status, phrase, nua, profile, nh, sofia_private, sip, tags);
+		break;
+	case nua_r_authenticate:
+
+		if (status >= 500) {
+			if (sofia_private && sofia_private->gateway) {
+				nua_handle_destroy(sofia_private->gateway->nh);
+				sofia_private->gateway->nh = NULL;
+			} else {
+				nua_handle_destroy(nh);
+			}
+		}
+		
 		break;
 	default:
 		if (status > 100) {