The ornamental design for a workvehiclebody, as shown and described.
FIG. 1 is a side perspective view of a work vehicle body showing an embodiment of our new design;
FIG. 2 is a side view thereof;
FIG. 3 is an opposite side view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
Only the shapes and portions bounded by solid lines form the claimed design. The elements depicted in dashed lines are shown for illustrative purpose of environment and form no part of the ornamental design.