AT2CHAR()

  Short:
  ------
  AT2CHAR() Returns the String color equivalent of a color number

  Returns:
  --------
  <cColorString> => Color string

  Syntax:
  -------
  AT2CHAR(nColorAttribute)

  Description:
  ------------
  <nColorAttribute> the numeric color to be converted,
  is changed to <cColorString>, a clipper color string.

  Examples:
  ---------
   AT2CHAR(47)  // =>  "W/G"

  Source:
  -------
  S_AT2C.PRG