Convert array of street lines to the string even if it was empty

Author: vovayatsyuk

app/code/Magento/Customer/Model/Address/AbstractAddress.php

@@ -268,7 +268,7 @@ public function setData($key, $value = null)
     {
         if (is_array($key)) {
             $key = $this->_implodeArrayField($key);
-        } elseif (is_array($value) && !empty($value) && $this->isAddressMultilineAttribute($key)) {
+        } elseif (is_array($value) && $this->isAddressMultilineAttribute($key)) {
             $value = $this->_implodeArrayValues($value);
         }
         return parent::setData($key, $value);