Qt: PLModel: don't reset model on zoom

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

@@ -558,7 +558,6 @@ void StandardPLPanel::updateZoom( int i )
     A_ZOOM( iconView );
     A_ZOOM( listView );
 #undef A_ZOOM
-    currentView->reset();
 }
 
 void StandardPLPanel::changeModel( bool b_ml )

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

@@ -41,7 +41,7 @@ class AbstractPlViewItemDelegate : public QStyledItemDelegate
 public:
     AbstractPlViewItemDelegate( QWidget * parent = 0 ) : QStyledItemDelegate(parent) {}
     void paintBackground( QPainter *, const QStyleOptionViewItem &, const QModelIndex & ) const;
-    void setZoom( int z ) { i_zoom = z; };
+    void setZoom( int z ) { i_zoom = z; emit sizeHintChanged( QModelIndex() ); };
 
 protected:
     int i_zoom;