{
{    The purpose of this request is to get a copy of the next statistic from an
{ opened log file and return pointers to the statistic header, counters, and
{ descriptive_data in that statistic.  This interface should be used (along
{ with LGP$OPEN_LOG_FILE and LGP$CLOSE_LOG_FILE) to access any of the active
{ logs.  It allows access to logs by authorized users without requiring special
{ ring privilege validations.
{
{       LGP$GET_NEXT_STATISTIC (file_identifier, statistic_buffer,
{             statistic_header, counters, descriptive_data, status)
{
{ FILE_IDENTIFIER: (input)  Specifies the file identifier for an open log file.
{
{ STATISTIC_BUFFER: (input)  Specifies a buffer that the statistic can be
{       copied into.  The statistic is only copied into this buffer is the
{       request is reading an active log or if the statistic is in an old
{       format.
{
{ STATISTIC_HEADER: (output)  Variable to receive a pointer to the statistic
{       header.
{
{ COUNTERS: (output)  Variable to receive a pointer to the statistic counters.
{       If there are no counters on the statistic, a NIL pointer will be
{       returned.
{
{ DESCRIPTIVE_DATA: (output)  Variable to receive a pointer to the statistic
{       descriptive data.  If there is no descriptive data, a NIL pointer will
{       be returned.
{
{ STATUS: (output) Variable in which the completion status is returned.
{       CONDITIONS: lge$end_of_log
{                   lge$statistic_buffer_required
{                   lge$unknown_log_file_identifier
{
