xt/msgtime_cmp: fix false positives from msgtime change

commit d857e7dc0d816b635a7ead09c3273f8c2d2434be
("msgtime: assume +0000 if TZ missing when using Date::Parse")
introduced a behavior change which was causes false positives
when compared to the old code.

Update the "old" implementation to match this overdue behavior
change.

1 files changed, 7 insertions, 0 deletions

diff --git a/xt/msgtime_cmp.t b/xt/msgtime_cmp.t
index b77e57a6..4ebf5b2c 100644
--- a/xt/msgtime_cmp.t
+++ b/xt/msgtime_cmp.t
@@ -82,6 +82,13 @@ sub str2date_zone ($) {
 
         # off is the time zone offset in seconds from GMT
         my ($ss,$mm,$hh,$day,$month,$year,$off) = Date::Parse::strptime($date);
+
+        # new behavior which wasn't in the original old version:
+        if ('commit d857e7dc0d816b635a7ead09c3273f8c2d2434be') {
+                # "msgtime: assume +0000 if TZ missing when using Date::Parse"
+                $off //= '+0000';
+        }
+
         return undef unless(defined $off);
 
         # Compute the time zone from offset