Merge pull request #64 from spire-mike/patch-1

Fix SellerSKU option

Author: keithbrink

src/AmazonProductInfo.php

@@ -441,6 +441,7 @@ protected function prepareCategories()
         unset($this->options['ItemCondition']);
         if (array_key_exists('SellerSKUList.SellerSKU.1', $this->options)) {
             $this->options['Action'] = 'GetProductCategoriesForSKU';
+            $this->options['SellerSKU'] = $this->options['SellerSKUList.SellerSKU.1'];
             $this->resetASINs();
         } else {
             if (array_key_exists('ASINList.ASIN.1', $this->options)) {