Comment 6 for bug 1289411

Created attachment 5381
[PATCH] Fix xfce_dialog_show_help

Commit d5467df1c64ff6cf6884cd7347a3c8c62c49b32e turned
xfce_dialog_show_help into a no-op function. This patch changes it
so that it will use xfce_dialog_show_help_with_version with NULL
for the version. This will restore the previous functionality.
The current xfce_dialog_show_help function is here:
http://git.xfce.org/xfce/libxfce4ui/tree/libxfce4ui/xfce-dialogs.c#n148