Fix _dict_from_slots, solves Path comparison

Author: artemisart

deepdiff/diff.py

@@ -421,7 +421,7 @@ def unmangle(attribute):
                 else:
                     all_slots.extend(slots)
 
-        return {i: getattr(object, unmangle(i)) for i in all_slots}
+        return {i: getattr(object, unmangle(i), None) for i in all_slots}
 
     def _diff_enum(self, level, parents_ids=frozenset(), local_tree=None):
         t1 = detailed__dict__(level.t1, include_keys=ENUM_INCLUDE_KEYS)