title: aData is undefined using FormOnlyData in datatables
body: <p>I'm using JQuery DataTables I'm getting <code>TypeError: aData is undefined</code> following is my JS code:</p>
  
  <pre><code>$('#brands').DataTable({
        dom: "Bfrtip",
        serverside: true,
        ajax: "getCompanies",
        columns: [
            {data: "name"},
            {data: "last_name"},
            {data: "gender"},
            {data: "city"},
        ],
        select: true,
   });
  </code></pre>
  
  <p>This is my JSON reponse</p>
  
  <pre><code>{
    "data": [{
      "DT_RowId": "row_1",
      "id": 1,
      "company_id": 1,
      "name": "Saeed",
      "last_name": "last_name",
      "email": "uandsaeed
  @gmail.com",
      "password": "$2y$10$P4d496V0FPNF7DtcOZBFVeNBe5DYpCvR9nSBtoZs9.iI0DgzisuIW",
      "phone_no": "02123456744",
      "address": "fsd road abk",
      "skype_id": "",
      "city": "Lahore",
      "gender": "",
      "shoe_size": null,
      "user_type": "CompanyAdmin",
      "user_image": null,
      "remember_token": "j2eu3QeYfql1pdbgcrypYnErAHYBdlyxmOCzMF3rT1XQtpV48oYNwEtVHwrk",
      "created_at": "2016-07-15 20:02:55",
      "updated_at": "2016-07-29 10:30:27",
      "deleted_at": null
    }, {
      "DT_RowId": "row_3",
      "id": 3,
      "company_id": 2,
      "name": "Saeed nm",
      "last_name": "",
      "email": "saeed@gmail.com",
      "password": "$2y$10$u2qDYiBW2mPGH6IL0VsPzO
  \/YlUFI3QiizUgBPWPAI842r58ytsa..",
      "phone_no": "",
      "address": "",
      "skype_id": "",
      "city": "",
      "gender": "Male",
      "shoe_size": null,
      "user_type": "CompanyAdmin",
      "user_image": null,
      "remember_token": "H4P7H4Gv5XMjFPjjEDEtrsxp93MMbb4Vt9vut7vaLkJIXemmeWgbkTjzgarM",
      "created_at": "2016-07-15 20:22:52",
      "updated_at": "2016-07-19 10:06:23",
      "deleted_at": null
    }, {
      "DT_RowId": "row_4",
      "id": 4,
      "company_id": 3,
      "name": "company",
      "last_name": "last_name",
      "email": "company@gmail.com",
      "password": "$2y$10$8rpLCC7mquu2BNoeJVi6OeeA7p9KlTP3QRUc3B\/\/TIX5Vqx0yP7Nm",
      "phone_no": "098765433456",
      "address": "Iqbal Town, Lahore, Punjab, Pakistan",
      "skype_id": "",
      "city": "Lahore",
      "gender": "",
      "shoe_size": null,
      "user_type": "CompanyAdmin",
      "user_image": null,
      "remember_token": null,
      "created_at": "2016-07-27 11:55:31",
      "updated_at": "2016-07-27 11:55:31",
      "deleted_at": null
    }],
    "options": [],
    "files": []
  }
  </code></pre>
  
  <p>I'm following this as reference <a href="https://editor.datatables.net/examples/advanced/formOnlyData.html" rel="nofollow">data tables with Form Only Data</a></p>