ArduinoIoTCloudTCP: use getWaitTime() for broker connection retry

Author: pennam

src/ArduinoIoTCloudTCP.cpp

@@ -344,13 +344,10 @@ ArduinoIoTCloudTCP::State ArduinoIoTCloudTCP::handle_ConnectMqttBroker()
   }
 
   /* Can't connect to the broker. Wait: 2s -> 4s -> 8s -> 16s -> 32s -> 32s ... */
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wunused-variable"
-  unsigned long const reconnection_retry_delay = _connection_attempt.retry();
-#pragma GCC diagnostic pop
+  _connection_attempt.retry();
 
   DEBUG_ERROR("ArduinoIoTCloudTCP::%s could not connect to %s:%d", __FUNCTION__, _brokerAddress.c_str(), _brokerPort);
-  DEBUG_VERBOSE("ArduinoIoTCloudTCP::%s %d next connection attempt in %d ms", __FUNCTION__, _connection_attempt.getRetryCount(), reconnection_retry_delay);
+  DEBUG_VERBOSE("ArduinoIoTCloudTCP::%s %d next connection attempt in %d ms", __FUNCTION__, _connection_attempt.getRetryCount(), _connection_attempt.getWaitTime());
   /* Go back to ConnectPhy and retry to get time from network (invalid time for SSL handshake?)*/
   return State::ConnectPhy;
 }