Qt4: apprently fix the embedded video

code from ILEoo (not sure what this actually does)

modules/gui/qt4/components/interface_widgets.cpp

@@ -73,6 +73,7 @@ VideoWidget::VideoWidget( intf_thread_t *_p_i ) : QFrame( NULL ), p_intf( _p_i )
     plt.setColor( QPalette::Active, QPalette::Window , Qt::black );
     plt.setColor( QPalette::Inactive, QPalette::Window , Qt::black );
     setPalette( plt );
+    setAttribute( Qt::WA_PaintOnScreen, true );
 
     /* The core can ask through a callback to show the video.
      * NOTE: We need to block the video output core until the window handle

modules/gui/qt4/components/interface_widgets.hpp

@@ -103,6 +103,11 @@ public slots:
     void SetSizing( unsigned int, unsigned int );
 
 protected:
+    virtual QPaintEngine *paintEngine() const
+    {
+        return NULL;
+    }
+
     virtual void paintEvent(QPaintEvent *);
 };