Cppcheck warnings.

src/app/puzzle/vpcarrouselpiecelist.h

@@ -38,7 +38,7 @@ class VPCarrouselPieceList : public QListWidget
 {
     Q_OBJECT
 public:
-    VPCarrouselPieceList(QWidget* parent);
+    explicit VPCarrouselPieceList(QWidget* parent);
     ~VPCarrouselPieceList();
 
     /**

src/app/puzzle/vpgraphicssheet.h

@@ -41,7 +41,7 @@ public:
     ~VPGraphicsSheet();
 
     QRectF boundingRect() const override;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *item, QWidget *widget) override;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
 
 
     QRectF GetSheetRect() const;

src/app/puzzle/vppiece.h

@@ -42,7 +42,7 @@ class VPPiece : public QObject, public VLayoutPiece
     Q_OBJECT
 public:
     VPPiece();
-    VPPiece(VLayoutPiece layoutPiece);
+    explicit VPPiece(VLayoutPiece layoutPiece);
 
     ~VPPiece();
 

src/libs/vwidgets/vgraphicssimpletextitem.cpp

@@ -149,7 +149,7 @@ void VGraphicsSimpleTextItem::SetShowParentTooltip(bool show)
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-void VGraphicsSimpleTextItem::SetRealPos(QPointF pos)
+void VGraphicsSimpleTextItem::SetRealPos(const QPointF &pos)
 {
     m_realPos = pos;
 

src/libs/vwidgets/vgraphicssimpletextitem.h

@@ -63,7 +63,7 @@ public:
 
     void SetShowParentTooltip(bool show);
 
-    void SetRealPos(QPointF pos);
+    void SetRealPos(const QPointF &pos);
 
     QColor BaseColor() const;
     void   SetBaseColor(const QColor &baseColor);