Improved checks in openvz plugin and DB library.

Till Brehm

2014-08-13 94b44c61a92adcc52feed671f24a09f1f564cc3a

 interface/web/js/uni-form/uni-form.jquery.js

@@ -101,6 +101,7 @@
      unit_obj = $("#"+ datetime_id + "_" + unit_name);
      if (unit_obj.val() !== null) {
         unit_obj.val(unit_value);
            unit_obj.change();
      }
   });
}