The ornamental design for a portion of a flashlight, substantially as shown and described.
FIG. 1 is a perspective view of the flashlight as seen from the front, left side;
FIG. 2 is a front elevational view of the flashlight of FIG. 1;
FIG. 3. is a left side elevational view of the flashlight of FIG. 1, the other side elevational view being a mirror image thereof;
FIG. 4 is a rear elevational view of the flashlight of FIG. 1;
FIG. 5 is a top plan view of the flashlight of FIG. 1; and,
FIG. 6 is a bottom plan view of the flashlight of FIG. 1.
The broken lines which define the bounds of the claimed design form no part thereof. The broken lines showing the remainder of the flashlight are for illustrative purposes only and form no part of the claimed design.