CustomSortFilterModel example: fix build with QT_NO_CURSOR

Change-Id: Icb40e49365114fedd5f1ef118dbd61ff2c413863
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

examples/widgets/itemviews/customsortfiltermodel/filterwidget.cpp

@@ -81,7 +81,9 @@ FilterWidget::FilterWidget(QWidget *parent)
 
     const QIcon icon = QIcon(QPixmap(":/images/find.png"));
     QToolButton *optionsButton = new QToolButton;
+#ifndef QT_NO_CURSOR
     optionsButton->setCursor(Qt::ArrowCursor);
+#endif
     optionsButton->setFocusPolicy(Qt::NoFocus);
     optionsButton->setStyleSheet("* { border: none; }");
     optionsButton->setIcon(icon);