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>

3 files changed, 4 insertions, 4 deletions

diff --git a/src/qmldebug/qqmldebugclient.cpp b/src/qmldebug/qqmldebugclient.cpp
index 7f1e8c637c..d412b7b267 100644
--- a/src/qmldebug/qqmldebugclient.cpp
+++ b/src/qmldebug/qqmldebugclient.cpp
@@ -77,7 +77,7 @@ void QQmlDebugClientPrivate::addToConnection()
     Q_Q(QQmlDebugClient);
     if (connection && !connection->addClient(name, q)) {
         qWarning() << "QQmlDebugClient: Conflicting plugin name" << name;
-        connection = 0;
+        connection = nullptr;
     }
 }
 
diff --git a/src/qmldebug/qqmldebugconnection.cpp b/src/qmldebug/qqmldebugconnection.cpp
index 73ccd7c854..1f40cab049 100644
--- a/src/qmldebug/qqmldebugconnection.cpp
+++ b/src/qmldebug/qqmldebugconnection.cpp
@@ -82,7 +82,7 @@ public:
 };
 
 QQmlDebugConnectionPrivate::QQmlDebugConnectionPrivate() :
-    protocol(0), device(0), server(0), gotHello(false),
+    protocol(nullptr), device(nullptr), server(nullptr), gotHello(false),
     currentDataStreamVersion(QDataStream::Qt_4_7),
     maximumDataStreamVersion(QDataStream::Qt_DefaultCompiledVersion)
 {
@@ -303,7 +303,7 @@ void QQmlDebugConnection::close()
 
     if (d->device) {
         d->device->deleteLater();
-        d->device = 0;
+        d->device = nullptr;
     }
 }
 
diff --git a/src/qmldebug/qqmldebugconnection_p.h b/src/qmldebug/qqmldebugconnection_p.h
index be425b6cbf..ad9376886c 100644
--- a/src/qmldebug/qqmldebugconnection_p.h
+++ b/src/qmldebug/qqmldebugconnection_p.h
@@ -64,7 +64,7 @@ class QQmlDebugConnection : public QObject
     Q_DISABLE_COPY(QQmlDebugConnection)
     Q_DECLARE_PRIVATE(QQmlDebugConnection)
 public:
-    QQmlDebugConnection(QObject *parent = 0);
+    QQmlDebugConnection(QObject *parent = nullptr);
     ~QQmlDebugConnection();
 
     void connectToHost(const QString &hostName, quint16 port);