fix bug in _get_named_modules

[faaany]

What does this PR do?

I got the following error when running the UT in transformers: tests/models/glpn/test_modeling_glpn.py::GLPNModelTest::test_model_parallelism

src/transformers/modeling_utils.py:3780: in from_pretrained
    device_map = infer_auto_device_map(model, dtype=target_dtype, **device_map_kwargs)
../accelerate/src/accelerate/utils/modeling.py:1238: in infer_auto_device_map
    tied_parameters = find_tied_parameters(model)
../accelerate/src/accelerate/utils/modeling.py:708: in find_tied_parameters
    all_named_parameters = {name: param for name, param in _get_named_parameters(model, remove_duplicate=False)}
../accelerate/src/accelerate/utils/modeling.py:708: in <dictcomp>
    all_named_parameters = {name: param for name, param in _get_named_parameters(model, remove_duplicate=False)}
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

module = None, prefix = '', recurse = True, remove_duplicate = False

    def _get_named_parameters(module: torch.nn.Module, prefix="", recurse=True, remove_duplicate: bool = True):
        """
        Help yield various names + members of modules. Copied from PyTorch `torch.nn.Module.named_modules` for
        compatability with torch < 2.0 versions with `remove_duplicate` option added.
        """
        memo = set()
        modules = (
            _get_named_modules(module, prefix=prefix, remove_duplicate=remove_duplicate) if recurse else [(prefix, module)]
        )
        for module_prefix, module in modules:
>           members = module._parameters.items()
E           AttributeError: 'NoneType' object has no attribute '_parameters'

../accelerate/src/accelerate/utils/modeling.py:667: AttributeError

Pls have a review. Thx!
@muellerzr

[SunMarc]

Thanks for the PR @faaany ! I left a comment

[SunMarc]

Nice job @faaany ! Thanks for your help !

[muellerzr]

Thanks for the fix!

[HuggingFaceDocBuilderDev]

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[SunMarc]

CI failing test is unrelated, merging !