minor: fix for small bug with copying manipulators - thanks david gordon

Author: Mike Dirolf

pymongo/database.py

@@ -82,7 +82,7 @@ def method_overwritten(instance, method):
  if method_overwritten(manipulator, "transform_incoming"):
  self.__incoming_copying_manipulators.insert(0, manipulator)
  if method_overwritten(manipulator, "transform_outgoing"):
- self.__outgoing_manipulators.insert(0, manipulator)
+ self.__outgoing_copying_manipulators.insert(0, manipulator)
  else:
  if method_overwritten(manipulator, "transform_incoming"):
  self.__incoming_manipulators.insert(0, manipulator)