unirec: BUGFIX check "todo" list of fields

When the list of IPFIX fields of a record is processed, the plugin
checks the list of remaining UniRec fields that are required.
If some required UniRec field is not filled, the message cannot be
sent.

This patch fixes the condition that distinguishes end of the list with
everything filled and not-filled-yet field.

Author: cejkato2

extra_plugins/output/unirec/translator.c

@@ -780,7 +780,7 @@ translator_translate(translator_t *trans, struct conf_unirec *conf, struct fds_d
         /* just check the whole array */
     }
 
-    if (trans->todo_fields[i] != 0) {
+    if (i < trans->urtmpl->count && trans->todo_fields[i] != 0) {
         IPX_CTX_WARNING(trans->ctx, "There is some required field that was not filled (%s), processed %d fields.", ur_get_name(trans->urtmpl->ids[i]), converted_fields);
         return 0;
     }