Instance of DHT class within specialised class

Sorry, cut and paste error; Here is the body of the DHT22TempHumidity class;

/*
  DHT22TempHumidity.cpp - basic template for LMS 10000 sensor
  Copyright (c) 2012 Mark Batchelour.  All right reserved.
  www.LMS10000.org
 
*/

// include core Wiring API
#include "arduino.h"

// include this library's description file
#include "DHT22TempHumidity.h"
#include <dht.h>


// Constructor /////////////////////////////////////////////////////////////////
// Function that handles the creation and setup of instances

DHT22TempHumidity:: DHT22TempHumidity(int sensorPin)
{
  
  // initialize this instance's variables
  value = sensorPin;
  

  // init
}

// Public Methods //////////////////////////////////////////////////////////////
// Functions available in Wiring sketches, this library, and other libraries

float DHT22TempHumidity::GetValue(void)
{
}

float DHT22TempHumidity::ReadSensor(void)
{
}

void DHT22TempHumidity::DisplaySerial(void)
{

}

void DHT22TempHumidity::DisplayLcd(void)
{
}

// Private Methods /////////////////////////////////////////////////////////////
// Functions only available to other functions in this library