PTTGLI ( list, startx, ntags, tags, ifail )
===========================================

  Put values into a list of tags

    Can be called from the GO.

Receives:
  KI_tag_list_<tag>        *list           --- list in which to put tags
 <KI_int_index>            *startx         --- position in list where first
                                           --- value is to be put
  KI_int_nitems            *ntags          --- number of tags to be put
                                           --- into list
  KI_tag                    tags[ntags]    --- tags to put into list

Returns:
  KI_cod_error             *ifail          --- failure indicator

Specific errors:
  KI_bad_index              'startx' not in range 1 to list length + 1

Description:
  The given values are put into the list. The first value goes into the
  'startx' position, the second into 'startx' + 1 and so on. The first element
  in the list is number 1.

  'startx' must not be greater then the current length of the list plus 1.

  If 'startx' is zero then the given values are appended to the end of the list.

  If 'startx' is in the range[1, length of list], existing elements will be
  overwritten.

  PTTGLI does not perform any check on the validity of the tags to be inserted.