Maemo: Add missing default argument to overriding member function.

src/plugins/qt4projectmanager/qt-maemo/maemodeviceconfiglistmodel.h

@@ -56,7 +56,8 @@ public:
     void fromMap(const QVariantMap &map);
 
     virtual int rowCount(const QModelIndex &parent = QModelIndex()) const;
-    virtual QVariant data(const QModelIndex &index, int role) const;
+    virtual QVariant data(const QModelIndex &index,
+        int role = Qt::DisplayRole) const;
 
 signals:
     void currentChanged();