Merge pull request django-cms#2498 from pulilab/support/2.4.x

get_attribute should never raise KeyError

Author: digi604

menus/base.py

@@ -49,7 +49,7 @@ def get_absolute_url(self):
         return self.url
 
     def get_attribute(self, name):
-        return self.attr[name]
+        return self.attr.get(name)
 
     def get_descendants(self):
         nodes = []
@@ -63,4 +63,4 @@ def get_ancestors(self):
         if getattr(self, 'parent', None):
             nodes.append(self.parent)
             nodes += self.parent.get_ancestors()
-        return nodes
+        return nodes