The ornamental design for a base for a poledisplay, as shown and described.
FIG. 1 is a perspective view of a base for a pole display showing my new design, the broken lines for illustrative purposes only forming no part of the claimed design;
FIG. 2 is a reduced side view thereof;
FIG. 3 is a reduced bottom plan view thereof;
FIG. 4 is a reduced top plan view thereof;
FIG. 5 is a perspective view of one base leg thereof;
FIG. 6 is a reduced top plan view of the base leg in FIG. 5;
FIG. 7 is a reduced rear side view thereof;
FIG. 8 is a reduced side elevational view thereof;
FIG. 9 is a reduced front elevational view thereof; and,