compilation fix for WXWIN_COMPATIBILITY_2_6==0

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40946 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/log.cpp

@@ -340,11 +340,15 @@ void wxLog::OnLog(wxLogLevel level, const wxChar *szString, time_t t)
 }
 
 // deprecated function
+#if WXWIN_COMPATIBILITY_2_6
+
 wxChar *wxLog::SetLogBuffer(wxChar * WXUNUSED(buf), size_t WXUNUSED(size))
 {
     return NULL;
 }
 
+#endif // WXWIN_COMPATIBILITY_2_6
+
 wxLog *wxLog::GetActiveTarget()
 {
     if ( ms_bAutoCreate && ms_pLogger == NULL ) {