Set a getter as virtual in media items

src/GUI/AbstractGraphicsMediaItem.h

@@ -50,6 +50,9 @@ public:
     /// Should return the unique uid of the contained media.
     virtual const QUuid& uuid() const = 0;
 
+    /// Clip contained in the item
+    virtual Clip* clip() const = 0;
+
     /// Return the type of the media
     virtual MainWorkflow::TrackType mediaType() const = 0;
 

src/GUI/GraphicsAudioItem.h

@@ -51,7 +51,7 @@ public:
 
     void setWidth( int width );
     void setHeight( int height );
-    Clip* clip() const;
+    virtual Clip* clip() const;
 
 protected:
     void                paintRect( QPainter* painter, const QStyleOptionGraphicsItem* option );

src/GUI/GraphicsMovieItem.h

@@ -51,7 +51,7 @@ public:
 
     void setWidth( int width );
     void setHeight( int height );
-    Clip* clip() const;
+    virtual Clip* clip() const;
 
 protected:
     void                paintRect( QPainter* painter, const QStyleOptionGraphicsItem* option );