Fix a bug with slider positionning

modules/gui/qt4/util/directslider.hpp

@@ -48,7 +48,7 @@ public:
 #endif
             int pos = (int)(minimum() +
                           (double)(event->x())/width1*(maximum()-minimum()) );
-            setSliderPosition( pos );
+            setValue( pos );
             QSlider::mousePressEvent(event);
         }
     }

modules/gui/qt4/util/input_slider.cpp

@@ -35,7 +35,7 @@ InputSlider::InputSlider( Qt::Orientation q,QWidget *_parent ) :
     setMinimum( 0 );
     setMaximum( 1000 );
     setSingleStep( 2 );
-    setPageStep( 1000 );
+    setPageStep( 10 );
     setTracking( true );
     connect( this, SIGNAL( valueChanged(int) ), this, SLOT( userDrag( int ) ) );
 }