use nullptr instead of 0 pointer

Author: 3nids

src/quickgui/qgsquickcoordinatetransformer.h

@@ -57,7 +57,7 @@ class QUICK_EXPORT QgsQuickCoordinateTransformer : public QObject
 
   public:
     //! Creates new coordinate transformer
-    explicit QgsQuickCoordinateTransformer( QObject *parent = 0 );
+    explicit QgsQuickCoordinateTransformer( QObject *parent = nullptr );
 
     //!\copydoc QgsQuickCoordinateTransformer::projectedPosition
     QgsPoint projectedPosition() const;

src/quickgui/qgsquickpositionkit.h

@@ -116,7 +116,7 @@ class QUICK_EXPORT QgsQuickPositionKit : public QObject
 
   public:
     //! Creates new position kit
-    explicit QgsQuickPositionKit( QObject *parent = 0 );
+    explicit QgsQuickPositionKit( QObject *parent = nullptr );
 
     //! \copydoc QgsQuickPositionKit::position
     bool hasPosition() const;