MDL-15257

Fix notice caused by (possibly) uninitialised variable.

Merged from STABLE_19

diff --git a/backup/restorelib.php b/backup/restorelib.php
index f3543c5c46e30096b763d3cbcbd095ef930729a6..af3e7d644f449004dbf79d8868290ffd295c151c 100644 (file)
--- a/backup/restorelib.php
+++ b/backup/restorelib.php
@@ -641,7 +641,7 @@ define('RESTORE_GROUPS_GROUPINGS', 3);
 
         // else we try to get it from the xml file
         //Now calculate the category
-        if (!$category) {
+        if (empty($category)) {
             $category = $DB->get_record("course_categories",array("id"=>$course_header->category->id,
                                    "name"=>$course_header->category->name));
         }