The ornamental design for a bracket for a camera, as shown and described.
FIG. 1 is a front view of a bracket for a camera in accordance with the present design;
FIG. 2 is an enlarged front view of the support bracket of FIG. 1;
FIG. 3 is an enlarged back view thereof;
FIG. 4 is an enlarged left side view thereof;
FIG. 5 is an enlarged right side view thereof;
FIG. 6 is an enlarged top view thereof; and,
FIG. 7 is an enlarged bottom view thereof.
The broken lines shown in the drawings illustrate portions of the bracket for a camera and environmental structure that form no part of the claimed design.