\param object A pointer to an existing SEEKTABLE object.
\param point_num Index into seekpoint array to set.
\param point The point to set.
\assert
\code object != NULL \endcode
\code object->type == FLAC__METADATA_TYPE_SEEKTABLE \endcode
\code object->data.seek_table.num_points > point_num \endcode
Set a seekpoint in a seektable.
\param object A pointer to an existing SEEKTABLE object. \param point_num Index into seekpoint array to set. \param point The point to set. \assert \code object != NULL \endcode \code object->type == FLAC__METADATA_TYPE_SEEKTABLE \endcode \code object->data.seek_table.num_points > point_num \endcode