From 4e788a261f17f0f20fda617531f2515b20a36376 Mon Sep 17 00:00:00 2001
From: djfiander <djfiander>
Date: Tue, 30 May 2006 01:02:12 +0000
Subject: [PATCH] Only attempt to add the Patron ID to the Checkin Response
 message if the ILS actually provides a valid $patron structure

---
 Sip/MsgType.pm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Sip/MsgType.pm b/Sip/MsgType.pm
index 610c576..f5a4271 100644
--- a/Sip/MsgType.pm
+++ b/Sip/MsgType.pm
@@ -672,7 +672,9 @@ sub handle_checkin {
 
     if ($protocol_version eq '2.00') {
 	$resp .= maybe_add(FID_SORT_BIN, $status->sort_bin);
-	$resp .= maybe_add(FID_PATRON_ID, $status->patron->id);
+	if ($status->patron) {
+	    $resp .= add_field(FID_PATRON_ID, $status->patron->id);
+	}
 	$resp .= maybe_add(FID_MEDIA_TYPE, $status->item->sip_media_type);
 	$resp .= maybe_add(FID_ITEM_PROPS, $status->item->sip_item_properties);
     }
-- 
2.11.0