fix utime() to set $!/errno when called on a closed handle

My 8334cae65 was intended to fix this, but the test was faulty, and
didn't correctly fail.

This started showing as a failure on cygwin, with the fixed test it
also fails on Linux, so fix doio.c as well.

1 files changed, 1 insertions, 0 deletions

diff --git a/t/io/fs.t b/t/io/fs.t
index a36fbe83ae..0628df8afa 100644
--- a/t/io/fs.t
+++ b/t/io/fs.t
@@ -265,6 +265,7 @@ SKIP: {
     check_utime_result($ut, $accurate_timestamps, $delta);
     # [perl #122703]
     close $fh;
+    $! = 0;
     ok(!utime($ut,$ut + $delta, $fh),
        "utime fails on a closed file handle");
     isnt($!+0, 0, "and errno was set");