Merge pull request #422 from magento-folks/2.0.11_bugs_pr

[Folks] Bugfix 2.0.11
- MAGETWO-58614 [Сheckout] Cannot checkout reordered products

app/code/Magento/Ui/view/base/web/js/lib/validation/rules.js

@@ -4,11 +4,12 @@
  */
 define([
     './utils',
+    'underscore',
     'jquery',
     'jquery/validate',
     'jquery/ui',
     'mage/translate'
-], function (utils, $) {
+], function (utils, _, $) {
     'use strict';
 
     /**
@@ -47,13 +48,13 @@ define([
     return {
         "min_text_length": [
             function (value, params) {
-                return value.length == 0 || value.length >= +params;
+                return _.isUndefined(value) || value.length == 0 || value.length >= +params;
             },
             $.mage.__('Please enter more or equal than {0} symbols.')
         ],
         "max_text_length": [
             function (value, params) {
-                return value.length <= +params;
+                return !_.isUndefined(value) && value.length <= +params;
             },
             $.mage.__('Please enter less or equal than {0} symbols.')
         ],