load_counted_long():  Changed a ValueError to an UnpicklingError, just because it seems more consistent with the rest of the code.
load_counted_long():  Changed a ValueError to an UnpicklingError, just
because it seems more consistent with the rest of the code.

cPickle_PyMapping_HasKey():  This extern function isn't used anywhere in
Python or Zope, so got rid of it.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator