From 0592d8e1ad7c8cab286b43743765fd1435cfac84 Mon Sep 17 00:00:00 2001
From: Ivan Kohler <ivan@freeside.biz>
Date: Thu, 4 Jun 2015 11:23:10 -0700
Subject: [PATCH] don't display a non-sensical duration for open sessions,
 RT#34966

---
 fs_selfservice/FS-SelfService/cgi/view_usage_details.html | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs_selfservice/FS-SelfService/cgi/view_usage_details.html b/fs_selfservice/FS-SelfService/cgi/view_usage_details.html
index 0388c2fad..27afe12a7 100644
--- a/fs_selfservice/FS-SelfService/cgi/view_usage_details.html
+++ b/fs_selfservice/FS-SelfService/cgi/view_usage_details.html
@@ -47,7 +47,9 @@
     $OUT .= '</TD><TD ALIGN="right">';
     $OUT .= Date::Format::time2str('%T%P %a&nbsp;%b&nbsp;%o&nbsp;%Y', $usage->{'acctstarttime'});
     $OUT .= '</TD><TD ALIGN="right">';
-    my $duration =  $usage->{'acctstoptime'} - $usage->{'acctstarttime'};
+    my $duration = ( $usage->{'acctstoptime'} && $usage->{'acctstarttime'} )
+                     ? ( $usage->{'acctstoptime'} - $usage->{'acctstarttime'} )
+                     : 0;
     $total += $duration;
     my $h = int($duration/3600);
     my $m = sprintf("%02d", int(($duration % 3600) / 60));
-- 
2.11.0