THE Vatican marked the first anniversary of the death of Pope Benedict XVI, with one of his closest aides saying he never would have approved a recent declaration allowing Catholic priests to bless same-sex couples. Cardinal Gerhard Mueller, who was the Church's doctrinal chief under Benedict, and Archbishop Georg Gaenswein, who was Benedict's private secretary, both German, were two headliners at an event marking the anniversary and organised by the conservative U.S.-based Catholic television network EWTN. "It never would have happened (under Benedict) because it was so ambiguous," Mueller said on the sidelines of the event when asked by Reuters…