fixed wxColourDialog crash

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7698 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk1/dialog.h

@@ -103,6 +103,9 @@ protected:
     // common part of all ctors
     void Init();
 
+    // common part of Destroy() and ~wxDialog
+    void CleanUp();
+
     virtual void DoSetSize(int x, int y,
                            int width, int height,
                            int sizeFlags = wxSIZE_AUTO);