The ornamental design for a nonsliplegcastprotector, as shown and described.
FIG. 1 is a front perspective view of a nonslip leg cast protector showing the new design;
FIG. 2 is another front perspective view thereof;
FIG. 3 is a left elevation view thereof;
FIG. 4 is a right elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof, with an enlargement portion circled;
FIG. 7 is a front elevation view thereof;
FIG. 8 is a back elevation view thereof; and,
FIG. 9 is an enlarged view identified by the portion circled in FIG. 6.
The broken lines in the drawings are for the purpose of illustrating portions of the nonslip leg cast protector that form no part of the claimed design.