mark all dtors which are virtual because base class dtor is virtual explicitly virtual themselves

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41020 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mgl/brush.h

@@ -33,7 +33,7 @@ public:
     wxBrush() {}
     wxBrush(const wxColour &colour, int style = wxSOLID);
     wxBrush(const wxBitmap &stippleBitmap);
-    ~wxBrush() {}
+    virtual ~wxBrush() {}
     bool operator == (const wxBrush& brush) const;
     bool operator != (const wxBrush& brush) const;
     bool Ok() const;