title: TypeError: t.slice is not a function (caused by "undefined") ng-table
body: <p>I'm facing with this issue in one page which contains table that uses ng-table.</p>
  
  <pre><code>Here is console log:
  TypeError: t.slice is not a function (caused by "undefined") at o
  (https://unpkg.com/ng-table@2.0.2/bundles/ng-table.min.js:1:14033) at s 
  (https://unpkg.com/ng-table@2.0.2/bundles/ng-table.min.js:1:14326) at e 
  (https://unpkg.com/ng-table@2.0.2/bundles/ng-table.min.js:1:16847) at l.reload (https://unpkg.com/ng-table@2.0.2/bundles/ng-table.min.js:1:21598) at
  https://unpkg.com/ng-table@2.0.2/bundles/ng-table.min.js:1:6817 at 
  Scope.$digest (http://localhost:3000/lib/angular/angular.js:17286:23) at
  Scope.$apply (http://localhost:3000/lib/angular/angular.js:17552:24) at 
  done (http://localhost:3000/lib/angular/angular.js:11697:47) at 
  completeRequest (http://localhost:3000/lib/angular/angular.js:11903:7) at
  XMLHttpRequest.requestLoaded     
  (http://localhost:3000/lib/angular/angular.js:11836:9) undefined
  </code></pre>
  
  <p>Do you have a clue about what causes this error?</p>
  
  <p><strong>EDIT :</strong>
  I added my codes to plunker.</p>
  
  <p><a href="https://plnkr.co/edit/LpuWWu8vB5Ng5EZegd8t?p=preview" rel="nofollow noreferrer">https://plnkr.co/edit/LpuWWu8vB5Ng5EZegd8t?p=preview</a></p>