don't throw error on this event now

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13519 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/sofia.c

@@ -494,6 +494,8 @@ void sofia_event_callback(nua_event_t event,
 	case nua_i_info:
 		sofia_handle_sip_i_info(nua, profile, nh, session, sip, tags);
 		break;
+	case nua_r_update:
+		break;
 	case nua_r_refer:
 		break;
 	case nua_i_refer: