The ornamental design for a palletprotector, as shown and described.
FIG. 1 is a front isometric view of a pallet protector, showing my design;
FIG. 2 is a rear isometric view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
The broken line showing of parts of the drawings is included for the purpose of illustrating portions of the pallet protector and forms no part of the claimed design.