I claim the ornamental design for a protective barbeque mat, as shown and described.
FIG. 1 is a perspective view of a first embodiment of the mat, shown in use with an on board barbeque attached to transom;
FIG. 2 is a front elevation view of the mat of FIG. 1;
FIG. 3 is a perspective view of a second embodiment of the mat, shown in use with an on board barbeque attached to railings;
FIG. 4 is a front elevation view of the mat of FIG. 3;
FIG. 5 is an enlarged bottom plan view of the mat of the embodiments of 1 and 2; and,
FIG. 6 is an enlarged borken away side elevation view of the lower portion of the matt of embodiments of 1 and 2.
The broken line showing of the barbeque, transom and railings in FIGS. 1 and 2 is included for the purpose of illustrating use and environment and forms no part of the claimed design.