NotificationZone: Fix memory leak

src/Gui/widgets/NotificationZone.cpp

@@ -36,6 +36,11 @@ NotificationZone::NotificationZone(QWidget *parent) :
     connect( m_timer, SIGNAL( timeout() ), this, SLOT( hideNotification() ) );
 }
 
+NotificationZone::~NotificationZone()
+{
+    delete m_ui;
+}
+
 void
 NotificationZone::notify( const QString &message )
 {

src/Gui/widgets/NotificationZone.h

@@ -39,6 +39,7 @@ class NotificationZone : public QWidget, public Singleton<NotificationZone>
 
     private:
         explicit NotificationZone(QWidget *parent = 0);
+        virtual ~NotificationZone();
 
     private:
         Ui::NotificationZone    *m_ui;