factor::miller_rabin: Squash another bug!  >:3
Detected by the testsuite improvement just prior.
@@ -57,7 +57,7 @@ pub(crate) fn test<A: Arithmetic + Basis>(m: A) -> Result {
for _a in A::BASIS.iter() {
let _a = _a % n;
if _a == 0 {
- break;
+ continue;
}
let a = m.from_u64(_a);
