testlib/OpenSSL/Test.pm: keep default input private.
If $_ is not private, it can wipe caller's one, which proved to be
problematic...
@@ -460,6 +460,7 @@ sub run {
# to make it easier to compare with a manual run of the command.
if ($opts{capture} || defined($opts{prefix})) {
my $pipe;
+ local $_;
open($pipe, '-|', "$prefix$cmd") or die "Can't start command: $!";
while(<$pipe>) {
