[xs][controller/package] bug fix: use _get_package_type in history fu…

…nction instead of trying to access the 'type' key on the package dict (may not exist).

ckan/controllers/package.py

@@ -375,7 +375,8 @@ def history(self, id):
                 )
             feed.content_type = 'application/atom+xml'
             return feed.writeString('utf-8')
-        return render( self._history_template(c.pkg_dict['type']))
+        package_type = self._get_package_type(id)
+        return render(self._history_template(package_type))
 
     def new(self, data=None, errors=None, error_summary=None):