From 09c2eb69e2976ec2fc46c87e82d77fc770dc6c71 Mon Sep 17 00:00:00 2001
From: mudrd8mz <mudrd8mz>
Date: Thu, 9 Oct 2008 11:04:12 +0000
Subject: [PATCH] MDL-16506 Fixed error when deleting the only page in the
 Lesson. Credit goes to Chris Bertagne for the patch.

---
 mod/lesson/action/delete.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mod/lesson/action/delete.php b/mod/lesson/action/delete.php
index 48aa1a84371..9be1272a12b 100644
--- a/mod/lesson/action/delete.php
+++ b/mod/lesson/action/delete.php
@@ -21,7 +21,9 @@
     delete_records("lesson_pages", "id", $pageid);
 
     // repair the hole in the linkage
-    if (!$thispage->prevpageid) {
+    if (!$thispage->prevpageid AND !$thispage->nextpageid) {
+        //This is the only page, no repair needed
+    } elseif (!$thispage->prevpageid) {
         // this is the first page...
         if (!$page = get_record("lesson_pages", "id", $thispage->nextpageid)) {
             error("Delete: next page not found");