error in named_dav_provider if unauthorized objects listed
this is a follow up of #42 (closed) and textgrid-python-clients#85 (closed)
there is a call to get_member, which calls tgsearch::info for every listed o dav object.
which returns an empty result. so the next step fails, as title, format and extent are note available
File "repdav/venv/lib/python3.11/site-packages/wsgidav/dav_provider.py", line 453, in get_member_list
member = self.get_member(name)
^^^^^^^^^^^^^^^^^^^^^
File "repdav/src/repdav/textgrid_named_dav_provider.py", line 86, in get_member
"title": response.result[0].object_value.generic.provided.title,
~~~~~~~~~~~~~~~^^^
IndexError: list index out of range