Nick Vivarelli International CorrespondentLux Vide, the Italian company behind high-end series “Medici” and “Leonardo,” has scored international sales on high-concept smaller cop show “Blanca” featuring a blind policewoman specialized in an analytical listening and decoding technique that helps her solve tough cases.The six-part “Blanca” has been sold by Lux to M6, which is France’s number two terrestrial network, and to Spain’s top linear channel Telecinco, ahead of the show’s Nov.