Merge pull request #860 from SchumacherFM/AdminGridColumnRendererFix

Feature: Magento\Backend\Block\Widget\Grid\Column\Renderer (MAGETWO-32153)

Author: maksek

app/code/Magento/Backend/Block/Widget/Grid/Column/Renderer/Currency.php

@@ -80,7 +80,7 @@ public function __construct(
      */
     public function render(\Magento\Framework\Object $row)
     {
-        if ($data = (string)$row->getData($this->getColumn()->getIndex())) {
+        if ($data = (string)$this->_getValue($row)) {
             $currency_code = $this->_getCurrencyCode($row);
             $data = floatval($data) * $this->_getRate($row);
             $sign = (bool)(int)$this->getColumn()->getShowNumberSign() && $data > 0 ? '+' : '';

app/code/Magento/Backend/Block/Widget/Grid/Column/Renderer/Price.php

@@ -48,7 +48,7 @@ public function __construct(
      */
     public function render(\Magento\Framework\Object $row)
     {
-        if ($data = $row->getData($this->getColumn()->getIndex())) {
+        if ($data = $this->_getValue($row)) {
             $currencyCode = $this->_getCurrencyCode($row);
 
             if (!$currencyCode) {