Mac function no longer exists (OK, so this is deprecated, but...)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33958 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

contrib/utils/wxrcedit/splittree.cpp

@@ -665,7 +665,7 @@ void wxSplitterScrolledWindow::OnScroll(wxScrollWinEvent& event)
     }
 
 #ifdef __WXMAC__
-    m_targetWindow->MacUpdateImmediately() ;
+    m_targetWindow->Update() ;
 #endif
 
     inOnScroll = false;