File db-1.85-rettype.patch of Package libdb4

--- db.1.85/btree/bt_seq.c.old
+++ db.1.85/btree/bt_seq.c
@@ -358,7 +358,7 @@
 	 * page) and return it.
 	 */
 	if ((ep = __bt_search(t, key, exactp)) == NULL)
-		return (NULL);
+		return (RET_SUCCESS);
 	if (*exactp) {
 		if (F_ISSET(t, B_NODUPS)) {
 			*erval = *ep;