message: fix checking whether function is already generated
diff: @@ -2594,7 +2594,7 @@ class RustWrapperGenerator(object):
  """
  if fi.kind == fi.KIND_FUNCTION or fi.fake_attrgetter:
  for item in self.generated_functions:
  - if item.name == fi.name and str(item.args) == str(fi.args):
  + if item.fullname == fi.fullname and str(item.args) == str(fi.args):
  return
  else:
  self.generated_functions.append(fi)
  