QGestureManager: port Q_FOREACH to ranged-for [3/6]

The "conflictedGestures" QHash is local to the function, and the code in
the loop body doesn't change it. The "gestures" QList (the value in the
QHash key/value pair) isn't changed in the loop (both the enclosing
for-loop and the for-loop iterating over the QList itself):
- the QGestureEvent constructor takes by const& so it couldn't have
  changed the QList

So use a const QList& instead of a copy.

Task-number: QTBUG-115803
Change-Id: I4d7f2f833fe0119b9c1ffa91b0cdba9561025382
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

src/widgets/kernel/qgesturemanager.cpp

@@ -651,7 +651,7 @@ void QGestureManager::deliverEvents(const QSet<QGesture *> &gestures,
     for (GesturesPerWidget::const_iterator it = conflictedGestures.constBegin(),
         e = conflictedGestures.constEnd(); it != e; ++it) {
         QWidget *receiver = it.key();
-        QList<QGesture *> gestures = it.value();
+        const QList<QGesture *> &gestures = it.value();
         qCDebug(lcGestureManager) << "QGestureManager::deliverEvents: sending GestureOverride to"
                 << receiver
                 << "gestures:" << gestures;
@@ -659,7 +659,7 @@ void QGestureManager::deliverEvents(const QSet<QGesture *> &gestures,
         event.t = QEvent::GestureOverride;
         // mark event and individual gestures as ignored
         event.ignore();
-        foreach(QGesture *g, gestures)
+        for (QGesture *g : gestures)
             event.setAccepted(g, false);
 
         QCoreApplication::sendEvent(receiver, &event);