Add wxABI_VERSION > 20601 wrappers

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@34878 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/log.h

@@ -288,6 +288,8 @@ private:
 // "trivial" derivations of wxLog
 // ----------------------------------------------------------------------------
 
+#if wxABI_VERSION > 20601
+
 // log everything to a buffer
 class WXDLLIMPEXP_BASE wxLogBuffer : public wxLog
 {
@@ -311,6 +313,8 @@ private:
     DECLARE_NO_COPY_CLASS(wxLogBuffer)
 };
 
+#endif // wxABI_VERSION
+
 // log everything to a "FILE *", stderr by default
 class WXDLLIMPEXP_BASE wxLogStderr : public wxLog
 {