Support Home Assistant Long-term Statistics #1087 (#1088)

main/ZgatewayRF2.ino

@@ -111,7 +111,8 @@ void RF2toMQTTdiscovery(JsonObject& data) {
                   (char*)getUniqueId(switchRF[1], "").c_str(), will_Topic,
                   switchRF[3], switchRF[4], switchRF[5], switchRF[6],
                   switchRF[7], 0, "", "", true, subjectMQTTtoRF2,
-                  "", "", "", "", false);
+                  "", "", "", "", false,
+                  stateClassNone);
 }
 #  endif