The ornamental design for doors for an automobile, as shown and described.
FIG. 1 is a left, front perspective view of doors for an automobile of our new design;
FIG. 2 is a left, rear perspective view thereof;
FIG. 3 is a left side elevation view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a front elevation view thereof; and,
FIG. 6 is a rear elevation view thereof.
Our design includes the mirror image of the embodiment depicted. The bottom and rear views form no part of the claimed design. The portion of the vehicle in light contrast is environment and is not a part of the claimed design.