The ornamental design for a taillamp for a vehicle, as shown and described.
FIG. 1 is a front left elevated perspective view of a tail lamp for a vehicle according to the present invention.
FIG. 2 is a front left perspective view of the tail lamp shown in FIG. 1.
FIG. 3 is a rear right elevated perspective view thereof.
FIG. 4 is a rear right perspective view thereof.
FIG. 5 is a front view thereof.
FIG. 6 is a rear view thereof.
FIG. 7 is a left side view thereof.
FIG. 8 is a right side view thereof.
FIG. 9 is a top view thereof.
FIG. 10 is a bottom view thereof; and,
FIG. 11 is another front view of the present design, in an environment of use, mounted on a vehicle that is shown in half tones which form no part of the claimed design. Rather, the inventive tail lamp is located within the broken line.