mod_dom: fix error handling for no retrieve elems

diff --git a/index/mod_dom.c b/index/mod_dom.c
index ea55b90..f4b17ed 100644 (file)
--- a/index/mod_dom.c
+++ b/index/mod_dom.c
@@ -1467,7 +1467,7 @@ static int filter_retrieve(void *clientData, struct recRetrieveCtrl *p)
     {
         p->diagnostic =
             YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
-        p->addinfo = odr_strdup(p->odr, esn);
+        p->addinfo = odr_strdup_null(p->odr, esn);
         return 0;
     }