BSE: fix bse_cxx_init namespace
BSE: fix bse_cxx_init namespace

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