The ornamental design for a childseatprotector, as shown and described.
FIG. 1 is a front-top-left perspective view of a child seat protector showing my new design;
FIG. 2 is a rear-top-left perspective view thereof;
FIG. 3 is a rear-bottom-right perspective view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a left-side elevational view thereof; and,
FIG. 9 is a right-side elevational view thereof.
The broken lines showing of rear flaps in FIGS. 1-9, an edge-wrapping strip in FIGS. 1-4, 6, and 8-9, and hook and loop fastening strips in FIGS. 1, 4, and 7 are included for the purpose of showing environmental structure and form no part of the claimed design.