QmlDesigner: compile fix

Change-Id: I1010276ef8cc0ad6affd068d9d036ef6bc36de72
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

src/plugins/qmldesigner/designmodewidget.cpp

@@ -544,7 +544,7 @@ void DesignModeWidget::addNavigatorHistoryEntry(const QString &fileName)
     ++m_navigatorHistoryCounter;
 }
 
-QWidget *DesignModeWidget::createCenterWidget() const
+QWidget *DesignModeWidget::createCenterWidget()
 {
     QWidget *centerWidget = new QWidget;
 

src/plugins/qmldesigner/designmodewidget.h

@@ -152,6 +152,7 @@ private: // functions
     QmlDesigner::ModelNode nodeForPosition(int cursorPos) const;
     void setupNavigatorHistory(Core::IEditor *editor);
     void addNavigatorHistoryEntry(const QString &fileName);
+    QWidget *createCenterWidget();
 
 private: // variables
     QSplitter *m_mainSplitter;