Qt: bigger spatializer UI font

(cherry picked from commit 1e0af725)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/qt4/components/extended_panels.cpp

@@ -1356,7 +1356,7 @@ Spatializer::Spatializer( intf_thread_t *_p_intf, QWidget *_parent )
             : QWidget( _parent ) , p_intf( _p_intf )
 {
     QFont smallFont = QApplication::font();
-    smallFont.setPointSize( smallFont.pointSize() - 2 );
+    smallFont.setPointSize( smallFont.pointSize() - 1 );
 
     QGridLayout *layout = new QGridLayout( this );