Fix clazy warning

src/game/game.h

@@ -267,9 +267,9 @@ signals:
     void boardSizeChanged(int);
 
     /** This signal is emitted when a player resigns. */
-    void resigned(const Player &);
+    void resigned(const Kigo::Player &);
 
-    void passMovePlayed(const Player &);
+    void passMovePlayed(const Kigo::Player &);
     /**
      * This signal is emitted when both players played a pass move
      * after another. It is also send when pass moves are gone
@@ -277,7 +277,7 @@ signals:
     void consecutivePassMovesPlayed(int);
 
     /** This signal is emitted when the current player changes. */
-    void currentPlayerChanged(const Player &);
+    void currentPlayerChanged(const Kigo::Player &);
 
     /**
      * This signal is emitted when the game starts or ends a

src/gui/config/generalconfig.h

@@ -42,7 +42,7 @@ public:
     /**
      * Standard Constructor. Sets up the loaded user interface.
      */
-    explicit GeneralConfig(QWidget *parent = 0);
+    explicit GeneralConfig(QWidget *parent = nullptr);
 
 private slots:
     void updateEngineCommand();

src/gui/graphicsview/gameview.h

@@ -46,7 +46,7 @@ public:
      * @param parent The (optional) parent widget
      * @see GameScene
      */
-    explicit GameView(GameScene *scene, QWidget *parent = 0);
+    explicit GameView(GameScene *scene, QWidget *parent = nullptr);
 
 private slots:
     void changeCursor(const QPixmap &cursorPixmap);

src/gui/mainwindow.h

@@ -48,7 +48,7 @@ class MainWindow : public KXmlGuiWindow
     Q_OBJECT
 
 public:
-    explicit MainWindow(const QString &fileName = QLatin1String(""), QWidget *parent = 0);
+    explicit MainWindow(const QString &fileName = QLatin1String(""), QWidget *parent = nullptr);
 
 private slots:
     void newGame();                         ///< Configure new game

src/gui/widgets/errorwidget.h

@@ -36,7 +36,7 @@ class ErrorWidget : public QWidget, private Ui::ErrorWidget
     Q_OBJECT
 
 public:
-    explicit ErrorWidget(QWidget *parent = 0);
+    explicit ErrorWidget(QWidget *parent = nullptr);
 
 signals:
     void configureClicked();

src/gui/widgets/gamewidget.h

@@ -39,7 +39,7 @@ class GameWidget : public QWidget, private Ui::GameWidget
     Q_OBJECT
 
 public:
-    explicit GameWidget(Game *game, QWidget *parent = 0);
+    explicit GameWidget(Game *game, QWidget *parent = nullptr);
 
 signals:
     void finishClicked();

src/gui/widgets/setupwidget.h

@@ -38,7 +38,7 @@ class SetupWidget : public QWidget, private Ui::SetupWidget
     Q_OBJECT
 
 public:
-    explicit SetupWidget(Game *game, QWidget *parent = 0);
+    explicit SetupWidget(Game *game, QWidget *parent = nullptr);
     ~SetupWidget();
 
 signals: