Added destructor for KReversiView

Added destructor for KReversiView to deleted owned game object. This is
done simply by calling setGame(0).

kreversiview.cpp

@@ -103,6 +103,11 @@ void KReversiView::setAnimationSpeed(int speed)
                               Q_ARG(QVariant, value));
 }
 
+KReversiView::~KReversiView()
+{
+    setGame(0);
+}
+
 void KReversiView::updateBoard()
 {
     for (int i = 0; i < 8; i++)

kreversiview.h

@@ -87,6 +87,10 @@ public:
      */
     void setAnimationSpeed(int speed);
 
+    /**
+     *  Destructor used to delete game object owned by class
+     */
+    ~KReversiView();
 public slots:
     /**
      *  Triggered on user click on board, connected to QML signal