NAME:
  wrtbl
 PURPOSE:
  Update the table file of a night's OSIRIS data
 DESCRIPTION:
 CATEGORY:
  File I/O
 CALLING SEQUENCE:
  wrtbl,tablname,tbl
 INPUTS:
  tablname - Table file to be updated
  tbl      - Structure containing the updated table information
 OPTIONAL INPUT PARAMETERS:
 KEYWORD INPUT PARAMETERS:
 OUTPUTS:
 KEYWORD OUTPUT PARAMETERS:
 COMMON BLOCKS:
 SIDE EFFECTS:
 RESTRICTIONS:
 PROCEDURE:
 MODIFICATION HISTORY:
  98/06/10 - Written by Chris Dalla Piazza, Lycoming College; extracted from
             xdspec