We claim the ornamental design for a doll, as shown and described.
FIG. 1 is a perspective view of a doll embodying the present invention.
FIG. 2 is front view of the doll of FIG. 1.
FIG. 3 is a rear view of the doll of FIG. 1.
FIG. 4 is right side view of the doll of FIG. 1.
FIG. 5 is a left side view of the doll of FIG. 1.
FIG. 6 is a top view of the doll of FIG. 1; and,
FIG. 7 is a bottom view of the doll of FIG. 1.
The showing of evenly broken lines is included for the purpose of illustrating portions that form no part of the claimed design. The dot-dash boundary line demarcates the boundary of the claimed area.