Qt: SeekSlider: Don't show tooltip for unknown time positions

modules/gui/qt4/util/input_slider.cpp

@@ -147,6 +147,8 @@ void SeekSlider::mouseMoveEvent( QMouseEvent *event )
     }
 
     /* Tooltip */
+    if ( inputLength > 0 )
+    {
         int posX = qMax( rect().left(), qMin( rect().right(), event->x() ) );
 
         QPoint p( event->globalX() - ( event->x() - posX ) - ( mTimeTooltip->width() / 2 ),
@@ -156,6 +158,7 @@ void SeekSlider::mouseMoveEvent( QMouseEvent *event )
         secstotimestr( psz_length, ( posX * inputLength ) / size().width() );
         mTimeTooltip->setTime( psz_length );
         mTimeTooltip->move( p );
+    }
     event->accept();
 }
 
@@ -176,7 +179,7 @@ void SeekSlider::wheelEvent( QWheelEvent *event )
 void SeekSlider::enterEvent( QEvent *e )
 {
     /* Don't show the tooltip if the slider is disabled */
-    if( isEnabled() )
+    if( isEnabled() && inputLength > 0 )
         mTimeTooltip->show();
 }