Fix crash when file progress is empty

[xoriole]

Fixes #7106

[xoriole]

Building on mac action failed with the following stacktrace:

33450 INFO: Loading module hook 'hook-faker.py' from '/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/_pyinstaller_hooks_contrib/hooks/stdhooks'...
Traceback (most recent call last):
  File "<string>", line 2, in <module>
ModuleNotFoundError: No module named 'text_unidecode'
Traceback (most recent call last):
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/utils/hooks/__init__.py", line 357, in get_module_file_attribute
    attr = loader.get_filename(package)
AttributeError: 'NoneType' object has no attribute 'get_filename'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/depend/imphook.py", line 408, in _load_hook_module
    self._hook_module = importlib_load_source(
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/compat.py", line 598, in importlib_load_source
    return mod_loader.load_module()
  File "<frozen importlib._bootstrap_external>", line 522, in _check_name_wrapper
  File "<frozen importlib._bootstrap_external>", line 1022, in load_module
  File "<frozen importlib._bootstrap_external>", line 847, in load_module
  File "<frozen importlib._bootstrap>", line 265, in _load_module_shim
  File "<frozen importlib._bootstrap>", line 702, in _load
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 843, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/_pyinstaller_hooks_contrib/hooks/stdhooks/hook-faker.py", line 17, in <module>
    collect_data_files('text_unidecode') +  # noqa: W504
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/utils/hooks/__init__.py", line 790, in collect_data_files
    pkg_base, pkg_dir = get_package_paths(package)
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/utils/hooks/__init__.py", line 573, in get_package_paths
    file_attr = get_module_file_attribute(package)
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/utils/hooks/__init__.py", line 375, in get_module_file_attribute
    raise ImportError('Unable to load module attribute') from e
ImportError: Unable to load module attribute

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/runner/work/tribler/tribler/build-env/bin/pyinstaller", line 33, in <module>
    sys.exit(load_entry_point('pyinstaller==4.2', 'console_scripts', 'pyinstaller')())
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/__main__.py", line 114, in run
    run_build(pyi_config, spec_file, **vars(args))
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/__main__.py", line 65, in run_build
    PyInstaller.building.build_main.main(pyi_config, spec_file, **kwargs)
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/building/build_main.py", line 725, in main
    build(specfile, kw.get('distpath'), kw.get('workpath'), kw.get('clean_build'))
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/building/build_main.py", line 672, in build
    exec(code, spec_namespace)
  File "tribler.spec", line 113, in <module>
    a = Analysis(['src/run_tribler.py'],
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/building/build_main.py", line 242, in __init__
    self.__postinit__()
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/building/datastruct.py", line 160, in __postinit__
    self.assemble()
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/building/build_main.py", line 420, in assemble
    self.graph.process_post_graph_hooks()
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/depend/analysis.py", line 367, in process_post_graph_hooks
    module_hook.post_graph()
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/depend/imphook.py", line [447](https://github.com/Tribler/tribler/actions/runs/3368427585/jobs/5588030622#step:6:448), in post_graph
    self._load_hook_module()
  File "/Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/PyInstaller/depend/imphook.py", line 412, in _load_hook_module
    raise ImportErrorWhenRunningHook(
PyInstaller.exceptions.ImportErrorWhenRunningHook: Failed to import module __PyInstaller_hooks_0_faker required by hook for module /Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/_pyinstaller_hooks_contrib/hooks/stdhooks/hook-faker.py. Please check whether module __PyInstaller_hooks_0_faker actually exists and whether the hook is compatible with your version of /Users/runner/work/tribler/tribler/build-env/lib/python3.8/site-packages/_pyinstaller_hooks_contrib/hooks/stdhooks/hook-faker.py: You might want to read more about hooks in the manual and provide a pull-request to improve PyInstaller.
Error: Process completed with exit code 1.