stop fill pivoting LU only if the pivot is exactly 0
stop fill pivoting LU only if the pivot is exactly 0

madlib/eigen_backup,mjbshaw/Eigen,madlib/eigen_backup,madlib/eigen_backup,rotorliu/eigen,rotorliu/eigen,mjbshaw/Eigen,mjbshaw/Eigen,madlib/eigen_backup,rotorliu/eigen,rotorliu/eigen,mjbshaw/Eigen