The ornamental design for a tablepedestal, as shown and described.
FIG. 1 is a front elevational view of a table pedestal showing my design, wherein the phantom line showing forms no part of said design, the rear elevational view being a mirror image of the front view.
FIG. 2 is a right side elevation a view of the table pedestal, the left side view being a mirror image thereof.
FIG. 3 is a top elevational view of the table pedestal, the bottom view being a mirror image thereof; and,