guarding scrollbar

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61374 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/scrolbar_osx.cpp

@@ -21,6 +21,8 @@
 
 #include "wx/osx/private.h"
 
+#if wxUSE_SCROLLBAR
+
 IMPLEMENT_DYNAMIC_CLASS(wxScrollBar, wxControl)
 
 BEGIN_EVENT_TABLE(wxScrollBar, wxControl)
@@ -174,4 +176,6 @@ void wxScrollBar::TriggerScrollEvent( wxEventType scrollEvent )
         window->MacOnScroll( event );
     else
         HandleWindowEvent( event );
-}
+}
+
+#endif