The ornamental design for a smokingdevice, as shown and described.
FIG. 1 is a perspective view of a smoking device showing our new design.
FIG. 2 is a top plan view of the design;
FIG. 3 is a bottom plan view of the design;
FIG. 4 is a right side elevational view of the design;
FIG. 5 is a left side elevational view of the design;
FIG. 6 is a front elevational view of the design; and,
FIG. 7 is a rear elevational view of the design, wherein the small holes are schematically depicted to represent the character of the respective surfaces of the design in its entirety, and wherein the broken lines are for the purpose of illustrating holes and flanges, and form no part of the claimed design.