Right parameters for 3D Audio

Hi

For your AM->audio_3d_set_listener_attributes try this:

  LMatrix4f mat = camera.get_mat();
  LVecBase3f lv = mat.get_row3(1);
  LVecBase3f uv = mat.get_row3(2);
  LVecBase3f pos = mat.get_row3(3);
  AM->audio_3d_set_listener_attributes(pos.get_x(),pos.get_y(),pos.get_z(),                                                                         0,0,0,
                                       lv.get_x(),lv.get_y(),lv.get_z(),
                                       uv.get_x(),uv.get_y(),uv.get_z());