The ornamental design for a wallet, as shown and described.
FIG. 1 is a top and front perspective view of the wallet showing my new design;
FIG. 2 is bottom and rear perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a left side elevational view thereof;
FIG. 8 is a right side elevational view thereof; and,
FIG. 9 is a front perspective view of the wallet in use.
The smaller broken lines showing a tab and the bottom surface of the wallet are for the purposes of illustrating environment. The wider spaced broken lines represent stitching and are part of the claimed design.