Silence some cppcheck warnings

libs_required/ACG/GL/ShaderGenerator.cc

@@ -2526,17 +2526,17 @@ public:
   virtual ~ShaderModifierFile() 
   {}
 
-  void modifyVertexIO(ShaderGenerator* _shader) { modifyIO(0, _shader); }
-  void modifyTessControlIO(ShaderGenerator* _shader) { modifyIO(1, _shader); }
-  void modifyTessEvalIO(ShaderGenerator* _shader) { modifyIO(2, _shader); }
-  void modifyGeometryIO(ShaderGenerator* _shader) { modifyIO(3, _shader); }
-  void modifyFragmentIO(ShaderGenerator* _shader) { modifyIO(4, _shader); }
+  void modifyVertexIO(ShaderGenerator* _shader) override { modifyIO(0, _shader); }
+  void modifyTessControlIO(ShaderGenerator* _shader) override { modifyIO(1, _shader); }
+  void modifyTessEvalIO(ShaderGenerator* _shader) override { modifyIO(2, _shader); }
+  void modifyGeometryIO(ShaderGenerator* _shader) override { modifyIO(3, _shader); }
+  void modifyFragmentIO(ShaderGenerator* _shader) override { modifyIO(4, _shader); }
 
 
-  void modifyVertexBeginCode(QStringList* _code) { _code->append(vertexBeginCode_); }
-  void modifyVertexEndCode(QStringList* _code) { _code->append(vertexEndCode_); }
-  void modifyFragmentBeginCode(QStringList* _code) { _code->append(fragmentBeginCode_); }
-  void modifyFragmentEndCode(QStringList* _code) { _code->append(fragmentEndCode_); }
+  void modifyVertexBeginCode(QStringList* _code) override { _code->append(vertexBeginCode_); }
+  void modifyVertexEndCode(QStringList* _code) override { _code->append(vertexEndCode_); }
+  void modifyFragmentBeginCode(QStringList* _code) override { _code->append(fragmentBeginCode_); }
+  void modifyFragmentEndCode(QStringList* _code) override { _code->append(fragmentEndCode_); }
 
   const QString& filename() const {return filename_;}
   const QDateTime& filetime() const {return filetime_;}

libs_required/ACG/QtWidgets/QtExaminerViewer.hh

@@ -130,13 +130,13 @@ private slots:
 protected:
 
   /// handle new key events
-  virtual bool viewKeyPressEvent(QKeyEvent* /* _event */ ) { return false; }
+  virtual bool viewKeyPressEvent(QKeyEvent* /* _event */ ) override { return false; }
   /// handle wheel events
-  virtual void viewWheelEvent(QWheelEvent* _event);
+  virtual void viewWheelEvent(QWheelEvent* _event) override;
   /// handle mouse events
-  virtual void viewMouseEvent(QMouseEvent* _event);
+  virtual void viewMouseEvent(QMouseEvent* _event) override;
   /// handle mouse events
-  virtual void lightMouseEvent(QMouseEvent* _event);
+  virtual void lightMouseEvent(QMouseEvent* _event) override;
 
 
 protected: