Fix null client when using MDNS. (#981)

main/main.ino

@@ -601,14 +601,6 @@ void setup() {
   digitalWrite(LED_SEND, !LED_SEND_ON);
   digitalWrite(LED_INFO, !LED_INFO_ON);
 
-#if defined(MDNS_SD) && (defined(ESP8266) || defined(ESP32))
-  Log.trace(F("Connecting to MQTT by mDNS without mqtt hostname" CR));
-  connectMQTTmdns();
-#else
-  long port;
-  port = strtol(mqtt_port, NULL, 10);
-  Log.trace(F("Port: %l" CR), port);
-  Log.trace(F("Mqtt server: %s" CR), mqtt_server);
 #if defined(ESP8266) || defined(ESP32)
   if (mqtt_secure) {
     eClient = new WiFiClientSecure;
@@ -619,8 +611,16 @@ void setup() {
 #else
   eClient = new EthernetClient;
 #endif
-
   client.setClient(*(Client*)eClient);
+
+#if defined(MDNS_SD) && (defined(ESP8266) || defined(ESP32))
+  Log.trace(F("Connecting to MQTT by mDNS without mqtt hostname" CR));
+  connectMQTTmdns();
+#else
+  long port;
+  port = strtol(mqtt_port, NULL, 10);
+  Log.trace(F("Port: %l" CR), port);
+  Log.trace(F("Mqtt server: %s" CR), mqtt_server);
   client.setServer(mqtt_server, port);
 #endif