MAGETWO-70838: 2.1 - Allow to use text swatch 0 #10282

 - Merge Pull Request #10282 from ihor-sviziev/magento2:allow-to-use-text-swatch-0
 - Merged commits:
   1. 2b46c8a
   2. bc8877a

app/code/Magento/Swatches/Model/Plugin/EavAttribute.php

@@ -430,7 +430,7 @@ protected function isOptionsValid(array $options, Attribute $attribute)
             if ($this->isOptionForDelete($attribute, $optionId)) {
                 continue;
             }
-            if (empty($option[0])) {
+            if (!isset($option[0]) || $option[0] === '') {
                 return false;
             }
         }