BSE: fix Bse::ErrorType 'blurb' fields (field 'label' was wrongly used)
BSE: fix Bse::ErrorType 'blurb' fields (field 'label' was wrongly used)

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