QtWidgets: Use Q_NULLPTR instead of 0 in all public headers

This is in preparation of adding -Wzero-as-null-pointer-constant (or similar)
to the headers check.

Task-number: QTBUG-45291
Change-Id: Ie67d235151ca8d4ef5e721c9cf4a6fd32bd167a0
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/widgets/graphicsview/qgraphicslinearlayout.h b/src/widgets/graphicsview/qgraphicslinearlayout.h
index 997bff7da1..3232da22ca 100644
--- a/src/widgets/graphicsview/qgraphicslinearlayout.h
+++ b/src/widgets/graphicsview/qgraphicslinearlayout.h
@@ -47,8 +47,8 @@ class QGraphicsLinearLayoutPrivate;
 class Q_WIDGETS_EXPORT QGraphicsLinearLayout : public QGraphicsLayout
 {
 public:
-    QGraphicsLinearLayout(QGraphicsLayoutItem *parent = 0);
-    QGraphicsLinearLayout(Qt::Orientation orientation, QGraphicsLayoutItem *parent = 0);
+    QGraphicsLinearLayout(QGraphicsLayoutItem *parent = Q_NULLPTR);
+    QGraphicsLinearLayout(Qt::Orientation orientation, QGraphicsLayoutItem *parent = Q_NULLPTR);
     virtual ~QGraphicsLinearLayout();
 
     void setOrientation(Qt::Orientation orientation);