The ornamental design for a frontgrille for a vehicle, as shown and described.
FIG. 1 is a front left perspective view of a front grille for a vehicle.
FIG. 2 is a rear right perspective view of the front grille shown in FIG. 1.
FIG. 3 is a front view thereof.
FIG. 4 is a rear view thereof.
FIG. 5 is a left side view thereof.
FIG. 6 is a right side view thereof.
FIG. 7 is a top view thereof.
FIG. 8 is a bottom view thereof; and,
FIG. 9 is a front view of the front grille for a vehicle.
The de-emphasized and half-tone portions showing in FIG. 9 is for the purpose of illustrating environmental structure and forms no part of the claimed design. The long dash lines showing in FIG. 9 define the bounds of the claimed design and form no part thereof. The short dash lines showing in FIG. 9 is for the purpose of illustrating environmental structure and forms no part of the claimed design.