Fix validation error

bbf_plugin/atm.c

@@ -121,7 +121,7 @@ static int get_atm_destination_address(char *refparam, struct dmctx *ctx, void *
 
 	dmuci_get_value_by_section_string(((struct dm_data *)data)->dmmap_section, "vpi", &vpi);
 	dmuci_get_value_by_section_string(((struct dm_data *)data)->config_section, "vci", &vci);
-	dmasprintf(value, "%s/%s", vpi, vci); // MEM WILL BE FREED IN DMMEMCLEAN
+	dmasprintf(value, "%s/%s", DM_STRLEN(vpi) ? vpi : "0", vci); // MEM WILL BE FREED IN DMMEMCLEAN
 	return 0;
 }