The ornamental design for a wastereceptacle, as shown and described.
FIG. 1 is a perspective view of a waste receptacle;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a left elevational view thereof;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a bottom plan view thereof.
The broken lines in FIG. 1, FIG. 2, FIG. 3, and FIG. 5 are included for the purpose of illustrating environmental structure and form no part of the claimed design.