surpress array to string conversion (OpenMage#605)

* surpress array to string conversion

surpress array to string conversion

not sure about all the use cases here but (string) would only affect FALSE to be empty string ""

all other variables woould be something else than an empty string

feedback welcome

* Updated check

app/code/core/Mage/Catalog/Block/Product/View/Attributes.php

@@ -63,7 +63,7 @@ public function getAdditionalData(array $excludeAttr = array())
 
  if (!$product->hasData($attribute->getAttributeCode())) {
  $value = Mage::helper('catalog')->__('N/A');
- } elseif ((string)$value == '') {
+ } elseif (is_null($value) || $value === false || $value === '') {
  $value = Mage::helper('catalog')->__('No');
  } elseif ($attribute->getFrontendInput() == 'price' && is_string($value)) {
  $value = Mage::app()->getStore()->convertPrice($value, true);