mas_safe_pivot
b_node->pivot[j] = mas_safe_pivot(mas, pivots, i, mt);
piv = mas_safe_pivot(mas, wr_mas->pivots, offset_end, wr_mas->type);
r_mas->last = mas_safe_pivot(r_mas, r_wr_mas->pivots,
mas->max = mas_safe_pivot(mas, pivots, mas->offset, mt);
max = mas_safe_pivot(mas, pivots, offset, type);
pivot = mas_safe_pivot(mas, pivots, offset, type);
p_end = mas_safe_pivot(mas, pivots, i, mt);
piv = mas_safe_pivot(mas, pivots, i, type);
mas->max = mas_safe_pivot(mas, pivots, mas->offset, type);
mas->max = mas_safe_pivot(mas, pivots, slot, mte_node_type(prev));