-char *grid_new_desc(grid_type type, int width, int height, int dual, random_state *rs);
-char *grid_validate_desc(grid_type type, int width, int height, int dual, char *desc);
+char *grid_new_desc(grid_type type, int width, int height, random_state *rs);
+char *grid_validate_desc(grid_type type, int width, int height, char *desc);