array entries might vanish during ptp_object_want, handle that case in find_child (AFL)
array entries might vanish during ptp_object_want, handle that case in find_child (AFL)

gphoto/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2