The ornamental design for a wastebasket, as shown and described.
FIG. 1 is a perspective view of a first embodiment of a wastebasket showing my new design.
FIG. 2 is a perspective view of a second embodiment of a wastebasket showing my new design.
FIG. 3 is a perspective view of a third embodiment of a wastebasket showing my new design.
FIG. 4 is a perspective view of a fourth embodiment of a wastebasket showing my new design.
FIG. 5 is a perspective view of a fifth embodiment of a wastebasket showing my new design.
FIG. 6 is a perspective view of a sixth embodiment of a wastebasket showing my new design; and,
FIG. 7 is a perspective view of a seventh embodiment of a wastebasket showing my new design.
The broken lines about the perimeter of each of the two holes in the wastebasket lid, about the perimeter of the wastebasket lid, and about the perimeter of the front and right side of the wastebasket bottom are for the purpose of illustrating stitching and are part of the claimed design. The broken lines showing Recycle and Trash words and icons are for the purpose of illustrating environment and form no part of the claimed design.