Thomas Bibaut

Attributes with sourceModel "eav/entity_attribute_source_boolean" usually have backendType "int". For example in the [core](https://github.com/OpenMage/magento-lts/blob/1.9.4.x/app/code/core/Mage/Catalog/sql/catalog_setup/mysql4-upgrade-1.4.0.0.27-1.4.0.0.28.php#L33). And because those attributes are not always using an "is_" prefix, this code map them as "long".