Typos in documentation

list and tree ctrl now actually set the text themselves
    and no longer crash
  various compile fixes


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3152 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/helpbase.h

@@ -20,6 +20,7 @@
 #include "wx/object.h"
 #include "wx/string.h"
 #include "wx/gdicmn.h"
+#include "wx/frame.h"
 
 #if wxUSE_HELP