Update filters.py

[m4ddav3]

Some log lines don't contain a 'path' field, so filter_path fails when it is used. Checking the value first prevents it from bailing out.

[gforcada]

Hi! Thanks for the PR! Indeed, if the path is missing it will fail. Do you have a log line that would show this?

If you could go the extra bit of adding a test and a changelog entry, I would merge it right away 🙂