The ornamental design for a belt, as shown and described.
FIG. 1 is a front and top perspective view of a belt, showing my new design;
FIG. 2 is a right side elevation view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a rear elevation view thereof; and,
FIG. 7 is a left side elevation view thereof.
The dashed broken lines shown in the drawings depict portions of the belt that form no part of the claimed design.
The hanging loops of the belt are shown with symbolic breaks in their lengths. The appearance of any portion of the article between these break lines forms not part of the claimed design.