Added --enable-extended_rtti configure switch (defaults to disabled).

Fix compilation when WXINTL_NO_GETTEXT_MACRO is defined.
  Added wx/flags.h to installed files.
  Fix XTI compilation after wxString changes.
  Fix 'virtual functions but non-virtual destructor' GCC warnings.
  Minimal XTI definition for wxOwnerDrawnComboBox (cut'n'paste
from wxComboBox, will need to be completed).
  Requires rerunning bakefile and autoconf.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45397 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/xtistrm.h

@@ -45,6 +45,8 @@ class WXDLLIMPEXP_BASE wxReader ;
 class WXDLLIMPEXP_BASE wxPersister
 {
 public :
+    virtual ~wxPersister() {}
+
     // will be called before an object is written, may veto by returning false
     virtual bool BeforeWriteObject( wxWriter *WXUNUSED(writer) , const wxObject *WXUNUSED(object) , const wxClassInfo *WXUNUSED(classInfo) , wxxVariantArray &WXUNUSED(metadata)) { return true ; }
 
@@ -186,6 +188,8 @@ private :
 class WXDLLIMPEXP_BASE wxDepersister
 {
 public :
+    virtual ~wxDepersister() {}
+
     // allocate the new object on the heap, that object will have the passed in ID
     virtual void AllocateObject(int objectID, wxClassInfo *classInfo, wxxVariantArray &metadata) = 0;