Use rand_hpd for rcond test

Author: termoshtt

tests/solve.rs

@@ -23,7 +23,7 @@ fn solve_random_t() {
 fn rcond() {
     macro_rules! rcond {
         ($elem:ty, $rows:expr, $atol:expr) => {
-            let a: Array2<$elem> = random(($rows, $rows));
+            let a: Array2<$elem> = random_hpd($rows);
             let rcond = 1. / (a.opnorm_one().unwrap() * a.inv().unwrap().opnorm_one().unwrap());
             assert_aclose!(a.rcond().unwrap(), rcond, $atol);
             assert_aclose!(a.rcond_into().unwrap(), rcond, $atol);