Fix 0 ptr reference for OPAC records from XML YAZ-822

diff --git a/src/xml_match.c b/src/xml_match.c
index 0a9019a..7dddb6f 100644 (file)
--- a/src/xml_match.c
+++ b/src/xml_match.c
@@ -16,7 +16,8 @@
 
 int yaz_match_xsd_element(xmlNodePtr ptr, const char *elem)
 {
-    if (ptr->type == XML_ELEMENT_NODE && !xmlStrcmp(ptr->name, BAD_CAST elem))
+    if (ptr && ptr->type == XML_ELEMENT_NODE &&
+        !xmlStrcmp(ptr->name, BAD_CAST elem))
     {
         return 1;
     }