I claim the ornamental design for a garment, as shown and described.
FIG. 1 is a front perspective view of a garment, showing my new design;
FIG. 2 is a left side view thereof;
FIG. 3 is a front view thereof; and,
FIG. 4 is a rear view thereof.
The dot-dash broken line represents an unclaimed boundary of the claimed design. The broken lines depicting the remainder of the garment show features that form no part of the claimed design.