QListView: fix a broken qBound

If a QListView's model is reset to an empty one, its columnCount()
below the root is going to be 0. Therefore, the code was doing a

  qBound(0, d->column, -1)

which is meaningless (high < low). Instead, do the two logical
operations explicitly: first do an upper bound on d->column
(using qMin) and then lower bound the result by 0 (using qMax).

The code worked by chance, because 0 was eventually the correct
number to use as a bound for d->column.

Change-Id: Ic32077cdab01eaa715137c05ed1f9d66c8eb2f67
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

src/widgets/itemviews/qlistview.cpp

@@ -690,7 +690,7 @@ void QListView::reset()
 void QListView::setRootIndex(const QModelIndex &index)
 {
     Q_D(QListView);
-    d->column = qBound(0, d->column, d->model->columnCount(index) - 1);
+    d->column = qMax(0, qMin(d->column, d->model->columnCount(index) - 1));
     QAbstractItemView::setRootIndex(index);
     // sometimes we get an update before reset() is called
     d->clear();