commented that redraw workaround as it was causing more harm than benefit

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26487 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/window.cpp

@@ -150,7 +150,7 @@ static pascal OSStatus wxMacWindowControlEventHandler( EventHandlerCallRef handl
                 {
                     // unfortunately this update region may be incorrect (tree ctrl sample )
                     // so we have to reset it
-                    updateRgn = (RgnHandle) visRegion.GetWXHRGN() ;
+                    // updateRgn = (RgnHandle) visRegion.GetWXHRGN() ;
                 }
                 // GrafPtr myport = cEvent.GetParameter<GrafPtr>(kEventParamGrafPort,typeGrafPtr) ;