more Unicode fixes for help files

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13879 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/helphtml.h

@@ -18,6 +18,13 @@
 #include "wx/helpbase.h"
 #include "wx/frame.h"
 
+/// Path separator.
+#ifdef __WXMSW__
+#define WXEXTHELP_SEPARATOR _T('\\')
+#else
+#define WXEXTHELP_SEPARATOR _T('/')
+#endif
+
 class WXDLLEXPORT wxExtHelpMapList;