QQmlEngine: use const QList for C++11 style iteration

Change-Id: Ice4c714e4b234bd03fb060ad185de440592787ea
Reviewed-by: Maximilian Goldstein <max.goldstein@qt.io>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/qml/qml/qqmlengine.cpp b/src/qml/qml/qqmlengine.cpp
index cad78f9bb7..88c7a21efc 100644
--- a/src/qml/qml/qqmlengine.cpp
+++ b/src/qml/qml/qqmlengine.cpp
@@ -1044,7 +1044,7 @@ QQmlEngine::~QQmlEngine()
     // we do this here and not in the private dtor since otherwise a crash can
     // occur (if we are the QObject parent of the QObject singleton instance)
     // XXX TODO: performance -- store list of singleton types separately?
-    QList<QQmlType> singletonTypes = QQmlMetaType::qmlSingletonTypes();
+    const QList<QQmlType> singletonTypes = QQmlMetaType::qmlSingletonTypes();
     for (const QQmlType &currType : singletonTypes)
         d->destroySingletonInstance(currType);