We claim the ornamental design for the razor cartridge guard, as shown and described.
FIG. 1 is an upper-front perspective view of a razor cartridge guard.
FIG. 2 is an upper-side perspective view thereof.
FIG. 3 is a top view thereof.
FIG. 4 is a bottom view thereof.
FIG. 5 is a front view thereof.
FIG. 6 is a rear view, opposite the view of FIG. 5.
FIG. 7 is a side view thereof; and,
FIG. 8 is a side view, opposite the view of FIG. 7.
The broken lines that connect the solid line disclosure illustrate the bounds of the claim. The remaining broken lines illustrate the environment for the razor cartridge guard. Neither of the broken line disclosures form part of the claimed design.