Tanggung jawab anggota direksi atas perbuatan hukum di luar kewenangannya terhadap perseroan terbatas : studi kasus perkara Mahkamah Agung no. 55 K/Pdt/2009 = Liability of the board of directors of outside authorithy to limited liability company : case study Supreme Court No. 55 K/Pdt/2009