COMP: Fix inconsistent-missing-override warnings

Fix warnings like:

    CTK/Libs/ImageProcessing/ITK/Core/ctkITKErrorLogMessageHandler.cpp:66:16: warning: 'DisplayText' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
      virtual void DisplayText(const char*);

Libs/ImageProcessing/ITK/Core/ctkITKErrorLogMessageHandler.cpp

@@ -63,12 +63,12 @@ public:
   {}
   ~ctkITKOutputWindow(){}
 
-  virtual void DisplayText(const char*);
-  virtual void DisplayErrorText(const char*);
-  virtual void DisplayWarningText(const char*);
+  virtual void DisplayText(const char*) ITK_OVERRIDE;
+  virtual void DisplayErrorText(const char*) ITK_OVERRIDE;
+  virtual void DisplayWarningText(const char*) ITK_OVERRIDE;
   virtual void DisplayGenericWarningText(const char*);
 
-  virtual void DisplayDebugText(const char*);
+  virtual void DisplayDebugText(const char*) ITK_OVERRIDE;
 
   QString parseText(const QString &text, ctkErrorLogContext &context);
 

Libs/Visualization/VTK/Core/ctkVTKErrorLogMessageHandler.cpp

@@ -41,19 +41,19 @@ class ctkVTKOutputWindow : public vtkOutputWindow
 public:
   static ctkVTKOutputWindow *New();
   vtkTypeMacro(ctkVTKOutputWindow,vtkOutputWindow);
-  void PrintSelf(ostream& os, vtkIndent indent);
+  void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;
 
   ctkVTKOutputWindow()
     : MessageHandler(0)
   {}
   ~ctkVTKOutputWindow(){}
 
-  virtual void DisplayText(const char*);
-  virtual void DisplayErrorText(const char*);
-  virtual void DisplayWarningText(const char*);
-  virtual void DisplayGenericWarningText(const char*);
+  virtual void DisplayText(const char*) VTK_OVERRIDE;
+  virtual void DisplayErrorText(const char*) VTK_OVERRIDE;
+  virtual void DisplayWarningText(const char*) VTK_OVERRIDE;
+  virtual void DisplayGenericWarningText(const char*) VTK_OVERRIDE;
 
-  virtual void DisplayDebugText(const char*);
+  virtual void DisplayDebugText(const char*) VTK_OVERRIDE;
 
   QString parseText(const QString &text, ctkErrorLogContext &context);
 

Libs/Visualization/VTK/Core/vtkLightBoxRendererManager.h

@@ -37,7 +37,7 @@ class vtkAlgorithmOutput;
 class CTK_VISUALIZATION_VTK_CORE_EXPORT vtkLightBoxRendererManager : public vtkObject
 {
   vtkTypeMacro(vtkLightBoxRendererManager,vtkObject);
-  void PrintSelf(ostream& os, vtkIndent indent);
+  void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;
   static vtkLightBoxRendererManager *New();
 
   void Initialize(vtkRenderWindow* renderWindow);