transform.final_kind() now returns None instead of raising NoSuchFile.
* bzrlib/transform.py: (TreeTransformBase.final_kind): Just return None instead of raising NoSuchFile since all callers just do that while catching the exception. (TreeTransformBase._improper_versioning) (TreeTransformBase._executability_conflicts) (TreeTransformBase._duplicate_entries) (TreeTransformBase._parent_type_conflicts) (TreeTransformBase._any_contents, TreeTransformBase._to_file_data) (TreeTransform._generate_inventory_delta) (_PreviewTree._make_inv_entries, _PreviewTree.walkdirs): Fix call sites.
* bzrlib/tests/test_transform.py: (TestTreeTransform.test_build): The single test needing a fix for final_kind returning None...