no need to update default colours and refresh if syscolours change, wxWindow does it

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@27973 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/statusbr.cpp

@@ -380,7 +380,6 @@ void wxStatusBarGeneric::InitColours()
 void wxStatusBarGeneric::OnSysColourChanged(wxSysColourChangedEvent& event)
 {
     InitColours();
-    Refresh();
 
     // Propagate the event to the non-top-level children
     wxWindow::OnSysColourChanged(event);