fix paypal standard payment issue when product option name longer tha…

…n 64 characters.

https://developer.paypal.com/docs/classic/paypal-payments-standard/integration-guide/Appx_websitestandard_htmlvariables/

upload/catalog/controller/extension/payment/pp_standard.php

@@ -41,7 +41,7 @@ public function index() {
 					}
 
 					$option_data[] = array(
-						'name'  => $option['name'],
+						'name'  => (utf8_strlen($option['name']) > 64 ? utf8_substr($option['name'], 0, 62) . '..' : $option['name']),
 						'value' => (utf8_strlen($value) > 20 ? utf8_substr($value, 0, 20) . '..' : $value)
 					);
 				}