wxUSE_XXX related fixes

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@32129 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/listbox.cpp

@@ -15,6 +15,8 @@
 
 #include "wx/wxprec.h"
 
+#if wxUSE_LISTBOX
+
 #include "wx/app.h"
 #include "wx/listbox.h"
 #include "wx/button.h"
@@ -902,3 +904,5 @@ void wxListBox::OnChar(wxKeyEvent& event)
 
 #endif // !TARGET_API_MAC_OSX
 
+#endif
+