Qt4: coverflow, only do animation if target is under 100 items away

It seems to take about 10s to scroll 100 items in my pc, and any longer than
that is just way too slow.

modules/gui/qt4/components/playlist/views.cpp

@@ -403,7 +403,11 @@ QRect PicFlowView::visualRect(const QModelIndex &index ) const
 
 void PicFlowView::scrollTo(const QModelIndex &index, QAbstractItemView::ScrollHint)
 {
-     picFlow->showSlide( index.row()-1 );
+     int currentIndex = picFlow->centerIndex();
+     if( qAbs( currentIndex - index.row()) > 100 )
+        picFlow->setCenterIndex( index.row()-1);
+     else
+        picFlow->showSlide( index.row()-1 );
 }
 
 QModelIndex PicFlowView::indexAt(const QPoint &) const