The ornamental design for a seat for motorvehicle, as shown and described.
FIG. 1 is a front perspective view of a seat for motor vehicle;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing of the seat for motor vehicle is for the purpose of illustrating portions of the seat for motor vehicle and forms no part of the claimed design.