FUNCTION BIGELEM()

  Short:
  ------
  BIGELEM() Returns length of longest string in an array

  Returns:
  --------
  <nLength> => Length of longest string in an array

  Syntax:
  -------
  BIGELEM(aTarget)

  Description:
  ------------
  Determines the length of the longest string element
  in <aTarget> Array may have mixed types

  Examples:
  ---------
   ?BIGELEM(  {"1","22","333"}  )  => returns 3

  Notes:
  -------
  This was a C function in previous SuperLibs

  Source:
  -------
  S_BIGEL.PRG