WaE: deleting object of abstract class type with non-virtual destructor

slideshow/source/engine/OGLTrans/unx/OGLTrans_TransitionImpl.cxx

@@ -272,6 +272,10 @@ SceneObject::SceneObject()
 {
 }
 
+SceneObject::~SceneObject()
+{
+}
+
 Iris::Iris()
     : SceneObject ()
 {

slideshow/source/engine/OGLTrans/unx/OGLTrans_TransitionImpl.hxx

@@ -176,6 +176,7 @@ class SceneObject
 {
 public:
     SceneObject();
+    virtual ~SceneObject();
 
     virtual void prepare() {};
     virtual void display(double nTime, double SlideWidth, double SlideHeight, double DispWidth, double DispHeight);