use nullptr consistently (clang-tidy)

From now on we prefer nullptr instead of 0 to clarify cases where
we are assigning or testing a pointer rather than a numeric zero.

Also, replaced cases where 0 was passed as Qt::KeyboardModifiers
with Qt::NoModifier (clang-tidy replaced them with nullptr, which
waas wrong, so it was just as well to make the tests more readable
rather than to revert those lines).

Change-Id: I4735d35e4d9f42db5216862ce091429eadc6e65d
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/quick/items/qquickdroparea.cpp b/src/quick/items/qquickdroparea.cpp
index c7606f90e1..b77fb40cb1 100644
--- a/src/quick/items/qquickdroparea.cpp
+++ b/src/quick/items/qquickdroparea.cpp
@@ -78,7 +78,7 @@ public:
 };
 
 QQuickDropAreaPrivate::QQuickDropAreaPrivate()
-    : drag(0)
+    : drag(nullptr)
     , containsDrag(false)
 {
 }
@@ -303,7 +303,7 @@ void QQuickDropArea::dragLeaveEvent(QDragLeaveEvent *)
     emit exited();
 
     d->containsDrag = false;
-    d->source = 0;
+    d->source = nullptr;
     emit containsDragChanged();
     if (d->drag)
         emit d->drag->sourceChanged();
@@ -328,7 +328,7 @@ void QQuickDropArea::dropEvent(QDropEvent *event)
     emit dropped(&dragTargetEvent);
 
     d->containsDrag = false;
-    d->source = 0;
+    d->source = nullptr;
     emit containsDragChanged();
     if (d->drag)
         emit d->drag->sourceChanged();