The ornamental design for a vehicleheadlight, as shown and described.
FIG. 1 is an elevational view of a right vehicle headlight (as viewed from the front of the vehicle, the left vehicle headlight being a mirror of the right and is not illustrated);
FIG. 2 is a right side elevational view of the vehicle headlight;
FIG. 3 is a left side elevational view of the vehicle headlight;
FIG. 4 is a top down plan view of the vehicle headlight; and,
FIG. 5 is bottom up plan view of the vehicle headlight.