  plline(n, x, y)
  ***************

  plline

  Draws n-1 line segments joining points (x[i], y[i]).

  n (PLINT, input): Number of points to join.

  x (PLFLT *, input): Pointer to array with x coordinates of points.

  y (PLFLT *, input): Pointer to array with y coordinates of points.

