diff --git a/src/abstractdisplay.cpp b/src/abstractdisplay.cpp
index c1d5e13..8abf5b4 100644
--- a/src/abstractdisplay.cpp
+++ b/src/abstractdisplay.cpp
@@ -1,96 +1,96 @@
 /*
    This file is part of the KDE games lskat program
    Copyright (c) 2006 Martin Heni <kde@heni-online.de>
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
 
    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.
 
    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
 */
 
 #include "abstractdisplay.h"
 
 // Qt includes
 
 // KDE includes
 #include "lskat_debug.h"
 
 // Local includes
 #include "deck.h"
 #include "cardsprite.h"
 #include "thememanager.h"
 
 // Define static attributes
 QHash<int, CardSprite *> AbstractDisplay::mCards;
 
 // Constructor for the engine
 AbstractDisplay::AbstractDisplay(Deck *deck, QGraphicsScene *scene, ThemeManager *theme,
                                  int advancePeriod, QGraphicsView *parent)
                : QObject(parent)
 {
     // Store the scene
     mScene = scene;
     // Store the view
     mView = parent;
     // Store advance period
     mAdvancePeriod = advancePeriod;
     // Store theme manager
     mTheme = theme;
 
     // Set up deck
     setDeck(deck);
 
     // Initialize sprites
     createCardSprites();
     mSprites.clear();
 }
 
 // Destructor.
 AbstractDisplay::~AbstractDisplay()
 {
     qDeleteAll(mSprites);
     // Do not delete static cards for performance reasons
 }
 
 // Store the deck object for accessing the card deck
 void AbstractDisplay::setDeck(Deck *deck)
 {
     mDeck = deck;
 }
 
 // Explicitly reset stored data, e.g. sprites.
 void AbstractDisplay::reset()
 {
     mCards.clear();
 }
 
 // Create all sprites and store them for later access
 void AbstractDisplay::createCardSprites()
 {
     // Only create sprites once (unless explicitly reset)
-    if (mCards.size() > 0) return;
+    if (!mCards.isEmpty()) return;
 
     // Loop all cards
     for (int cardNo = 0; cardNo < mDeck->cardNumber(); cardNo++)
     {
         // Create sprite with card correct card image
         Suite suite        = Suite(cardNo % 4);
         CardType cardtype  = CardType(cardNo / 4);
         CardSprite *sprite = new CardSprite(suite, cardtype, mTheme, mAdvancePeriod, mScene);
         // Display sprite
         sprite->hide();
 
         // Store sprite
         mCards[cardNo] = sprite;
     }// next
 }