The ornamental design for a wallet, as shown and described.
FIG. 1 is a perspective view of a wallet.
FIG. 2 is a front elevational view of the wallet of FIG. 1.
FIG. 3 is an end elevational view of the wallet of FIG. 1.
FIG. 4 is an end elevational view of the wallet of FIG. 1, opposite the end view of FIG. 3.
FIG. 5 is a rear elevational view of the wallet of FIG. 1.
FIG. 6 is a top plan view of the wallet of FIG. 1; and,
FIG. 7 is a bottom view of the wallet of FIG. 1.
The shape and features shown in broken line, of the wallet, in the accompanying Figures, are for illustrative purposes only and form no part of the claimed design.