QtCore: 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: I0cc388ef9faf45cbcf425ad0dc77db3060c104a8
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/corelib/statemachine/qsignaltransition.h b/src/corelib/statemachine/qsignaltransition.h
index bc56f4e9b7..c388323ec4 100644
--- a/src/corelib/statemachine/qsignaltransition.h
+++ b/src/corelib/statemachine/qsignaltransition.h
@@ -49,9 +49,9 @@ class Q_CORE_EXPORT QSignalTransition : public QAbstractTransition
     Q_PROPERTY(QByteArray signal READ signal WRITE setSignal NOTIFY signalChanged)
 
 public:
-    QSignalTransition(QState *sourceState = 0);
+    QSignalTransition(QState *sourceState = Q_NULLPTR);
     QSignalTransition(const QObject *sender, const char *signal,
-                      QState *sourceState = 0);
+                      QState *sourceState = Q_NULLPTR);
     ~QSignalTransition();
 
     QObject *senderObject() const;