The ornamental design for a pavingstone, as shown and described.
FIG. 1 is a perspective view of a paving stone showing my new design, the
same being generally cube-shaped and depicting the top and two sides
thereof;
FIG. 2 is a top plan view of the paving stone depicted in FIG. 1;
FIG. 3 is a perspective view of the paving stone rotated clockwise ninety
degrees with respect to FIG. 1; and,
FIG. 4 is a plan view showing the top surface of FIG. 3.
The surface(s) or portion(s) of the article not shown in the drawing or
described in the supecificant form(s) no part of the claimed design.