GotoXY procedure

  DECLARATION:  GotoXY(X, Y : Byte)

      PURPOSE:  Positions the cursor at a specified location

         UNIT:  CRT

      REMARKS:  The cursor is positioned at the location specified by the
                X and Y coordinates.  If Invalid coordinates are given to
                GotoXY, the procedure will be ignored.

           NOTES: This procedure is window relative.
                  The upper left corner is (1,1), the lower right is (80,25).