The ornamental design for a light for an automobile, as shown and described.
1. Light for an automobile
1.1 : Perspective
1.2 : Front
1.3 : Back
1.4 : Left
1.5 : Top
1.6 : Bottom
1.7 : Reference view
Reproduction 1.1 is a front perspective view of the light for an automobile; reproduction 1.2 is a front view thereof; reproduction 1.3 is a back view thereof; reproduction 1.4 is a left view thereof where the right view is a mirror image; reproduction 1.5 is a top view thereof; reproduction 1.6 is a bottom view thereof; reproduction 1.7 is a reference view showing the use state in which the claimed design has been installed on a vehicle, this design is for a light for an automobile that allows illumination from the driver's seat to the front passenger's seat.
The broken lines shown in the drawings illustrate environmental structure and form no part of the claimed design.