The ornamental design for a bodyportion of an automobile, as shown and described.
FIG. 1 is a front perspective view of a body portion of an automobile showing our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a right side view thereof, the left side view being a mirror image thereof, except for the fuel door which is not present on the left side; and,
FIG. 6 is a top plan view thereof.
The portion depicted in light contrast is environment and forms no part of the claimed design. The indicia forms no part of the claimed design.