MW-378 enabling build with WITH_WSREP=OFF only one fix here, enables build of...

MW-378 enabling build with WITH_WSREP=OFF only one fix here, enables build of mysqld however, building embedded server fails in linking phase

sql/handler.cc

@@ -1690,6 +1690,11 @@ int ha_rollback_trans(THD *thd, bool all)
       { // cannot happen
         my_error(ER_ERROR_DURING_ROLLBACK, MYF(0), err);
         error=1;
+#ifdef WITH_WSREP
+         WSREP_WARN("handlerton rollback failed, thd %lu %lld conf %d SQL %s",
+                    thd->thread_id, thd->query_id, thd->wsrep_conflict_state,
+                    thd->query());
+#endif /* WITH_WSREP */
       }
       status_var_increment(thd->status_var.ha_rollback_count);
       ha_info_next= ha_info->next();