The ornamental design for a roll-shutter slat, as shown in the drawings.
FIG. 1 is a right-side view of a roll-shutter slat showing my new design, the left side view being a mirror image thereof;
FIG. 2 is a top plan view thereof, wherein the broken lines depict the boundaries of the claim and wherein the area between the broken lines forms no part of the claimed design;
FIG. 3 is a bottom view thereof, wherein the broken lines depict the boundaries of the claim and wherein the area between the broken lines forms no part of the claimed design;
FIG. 4 is a front elevational view thereof, wherein the broken lines depict the boundaries of the claim and wherein the area between the broken lines forms no part of the claimed design;
FIG. 5 is a rear view thereof, wherein the broken lines depict the boundaries of the claim and wherein the area between the broken lines forms no part of the claimed design; and,
FIG. 6 is a perspective view thereof wherein the broken lines depict the boundaries of the claim and wherein the area between the broken lines forms no part of the claimed design.
The broken lines depict portions of the roll-shutter slat that form no part of the claimed design.