Explicitly mark overriding destructors as "virtual"

It appears that the C++ standard allows overriding destructors to be marked
"override," but at least some MSVC versions complain about it, so at least make
sure such destructors are explicitly marked "virtual."

Change-Id: I0e1cafa7584fd16ebdce61f569eae2373a71b0a1

6 files changed, 6 insertions, 6 deletions

diff --git a/canvas/source/cairo/cairo_canvas.hxx b/canvas/source/cairo/cairo_canvas.hxx
index 21c343d70194..82f3e7d6c3ef 100644
--- a/canvas/source/cairo/cairo_canvas.hxx
+++ b/canvas/source/cairo/cairo_canvas.hxx
@@ -113,7 +113,7 @@ namespace cairocanvas
         void initialize();
 
         /// For resource tracking
-        ~Canvas();
+        virtual ~Canvas();
 
         /// Dispose all internal references
         virtual void disposeThis() SAL_OVERRIDE;
diff --git a/canvas/source/cairo/cairo_textlayout.hxx b/canvas/source/cairo/cairo_textlayout.hxx
index d28af85054f7..cdad9311f4bf 100644
--- a/canvas/source/cairo/cairo_textlayout.hxx
+++ b/canvas/source/cairo/cairo_textlayout.hxx
@@ -93,7 +93,7 @@ namespace cairocanvas
                                const ::com::sun::star::rendering::RenderState&  renderState     ) const;
 
     protected:
-        ~TextLayout(); // we're a ref-counted UNO class. _We_ destroy ourselves.
+        virtual ~TextLayout(); // we're a ref-counted UNO class. _We_ destroy ourselves.
 
     private:
         ::com::sun::star::rendering::StringContext maText;
diff --git a/canvas/source/opengl/ogl_spritedevicehelper.cxx b/canvas/source/opengl/ogl_spritedevicehelper.cxx
index c6accde3e94d..34ce27b54af5 100644
--- a/canvas/source/opengl/ogl_spritedevicehelper.cxx
+++ b/canvas/source/opengl/ogl_spritedevicehelper.cxx
@@ -1208,7 +1208,7 @@ namespace oglcanvas
 #endif
             }
 
-            ~BufferContextImpl()
+            virtual ~BufferContextImpl()
             {
 #if 0
                 glBindTexture(GL_TEXTURE_2D, 0);
diff --git a/canvas/source/vcl/bitmapbackbuffer.hxx b/canvas/source/vcl/bitmapbackbuffer.hxx
index d8aecf063710..c3f2a27a7ba7 100644
--- a/canvas/source/vcl/bitmapbackbuffer.hxx
+++ b/canvas/source/vcl/bitmapbackbuffer.hxx
@@ -45,7 +45,7 @@ namespace vclcanvas
         BitmapBackBuffer( const BitmapEx&       rBitmap,
                           const OutputDevice&   rRefDevice );
 
-        ~BitmapBackBuffer();
+        virtual ~BitmapBackBuffer();
 
         virtual OutputDevice&       getOutDev() SAL_OVERRIDE;
         virtual const OutputDevice& getOutDev() const SAL_OVERRIDE;
diff --git a/canvas/source/vcl/canvas.hxx b/canvas/source/vcl/canvas.hxx
index 91c7d7166c80..a2ac127f4d0d 100644
--- a/canvas/source/vcl/canvas.hxx
+++ b/canvas/source/vcl/canvas.hxx
@@ -87,7 +87,7 @@ namespace vclcanvas
         void initialize();
 
         /// For resource tracking
-        ~Canvas();
+        virtual ~Canvas();
 
         /// Dispose all internal references
         virtual void disposeThis() SAL_OVERRIDE;
diff --git a/canvas/source/vcl/spritecanvas.hxx b/canvas/source/vcl/spritecanvas.hxx
index 3a4fffb0d98d..2343f38f2b52 100644
--- a/canvas/source/vcl/spritecanvas.hxx
+++ b/canvas/source/vcl/spritecanvas.hxx
@@ -112,7 +112,7 @@ namespace vclcanvas
         void initialize();
 
         /// For resource tracking
-        ~SpriteCanvas();
+        virtual ~SpriteCanvas();
 
         /// Dispose all internal references
         virtual void disposeThis() SAL_OVERRIDE;