BEAST: fix bstapi.idl generation for enums
BEAST: fix bstapi.idl generation for enums

tim-janik/beast,GNOME/beast,tim-janik/beast,swesterfeld/beast,tim-janik/beast,tim-janik/beast,GNOME/beast,swesterfeld/beast,swesterfeld/beast,swesterfeld/beast,GNOME/beast,swesterfeld/beast,tim-janik/beast,swesterfeld/beast,tim-janik/beast,GNOME/beast,swesterfeld/beast,GNOME/beast,GNOME/beast,tim-janik/beast,GNOME/beast