A SMALL gathering celebrated victory Friday afternoon at the Indonesian Legal Aid Institute building on Jakarta's Jalan Diponegoro. Two yellow rice cones were served in the middle of Adam Malik Room, welcoming the return of constitutional rights to the former prisoners of the September 30, 1965 movement (G30S). Some 20 men and women sat on chairs arranged round the room, savoring the recent and hard-won changes to Indonesia's discriminatory leg