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, 3 insertions, 3 deletions

diff --git a/src/widgets/itemviews/qtreewidget.h b/src/widgets/itemviews/qtreewidget.h
index 564e10ac1a..995528fe37 100644
--- a/src/widgets/itemviews/qtreewidget.h
+++ b/src/widgets/itemviews/qtreewidget.h
@@ -172,7 +172,7 @@ public:
     inline QTreeWidgetItem *parent() const { return par; }
     inline QTreeWidgetItem *child(int index) const {
         if (index < 0 || index >= children.size())
-            return 0;
+            return Q_NULLPTR;
         executePendingSort();
         return children.at(index);
     }
@@ -255,7 +255,7 @@ class Q_WIDGETS_EXPORT QTreeWidget : public QTreeView
     friend class QTreeModel;
     friend class QTreeWidgetItem;
 public:
-    explicit QTreeWidget(QWidget *parent = 0);
+    explicit QTreeWidget(QWidget *parent = Q_NULLPTR);
     ~QTreeWidget();
 
     int columnCount() const;
@@ -375,7 +375,7 @@ private:
 };
 
 inline void QTreeWidget::removeItemWidget(QTreeWidgetItem *item, int column)
-{ setItemWidget(item, column, 0); }
+{ setItemWidget(item, column, Q_NULLPTR); }
 
 inline QTreeWidgetItem *QTreeWidget::itemAt(int ax, int ay) const
 { return itemAt(QPoint(ax, ay)); }