added wxRTTI macros to stream classes (patch 1687073)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45473 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mstream.h

@@ -63,6 +63,7 @@ private:
     size_t m_length;
 
     // copy ctor is implemented above: it copies the other stream in this one
+    DECLARE_ABSTRACT_CLASS(wxMemoryInputStream)
     DECLARE_NO_ASSIGN_CLASS(wxMemoryInputStream)
 };
 
@@ -92,6 +93,7 @@ protected:
     wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode);
     wxFileOffset OnSysTell() const;
 
+    DECLARE_DYNAMIC_CLASS(wxMemoryOutputStream)
     DECLARE_NO_COPY_CLASS(wxMemoryOutputStream)
 };