Call type.__getattr__ in metaclass TypeMeta instead of defaulting to None (#225)
Call type.__getattr__ in metaclass TypeMeta instead of defaulting to None (#225)

This actually cases sphinx doc generation to fail, as it calls
hasattr(o, __orig_bases__). TypeMeta would end up returning True because
getattr would return None instead of raising an exception, and this
breaks assumptions made about Python type objects in Sphinx because None
is not considered a valid value for type.__orig_bases__.
angr/pyvex,angr/pyvex