Fixed GROUPADD_SYNC saving

source/ubl-settings-usergroups-settings.c

@@ -346,7 +346,7 @@ void on_useradd_sync_changed(ubl_settings_usergroups_additional_settings_window
 				}
 			}
 		}
-	if (!yon_char_is_empty(useradd_sync)){
+	if (!yon_char_is_empty(groupadd_sync)){
 	yon_config_register(GROUPADD_SYNC_parameter,GROUPADD_SYNC_parameter_command,groupadd_sync);
 	} else {
 		yon_config_remove_by_key(GROUPADD_SYNC_parameter);