Fix double curl bug

Fixed: call to makeCurl() was doing two sequential curl requests if no $cookieSet parameter was passed.

GoogleTranslate.php

@@ -89,6 +89,7 @@ public static final function makeCurl($url, array $params = array(), $cookieSet
             curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie);
             curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
             $output = curl_exec($ch);
+            return $output;
         }
 
         $queryString = http_build_query($params);