Safer check if there's missmatch for the entry?

[Peter Hedenskog]

Hi!

I can not reproduce this every time, but it has happened couple of times, especially when I access multiple pages after each other in Browsertime:

/Users/peter/git/browsertime/node_modules/ff-test-bidi-har-export/src/har-recorder.js:357
    entry.request = params.request;
                  ^
TypeError: Cannot set properties of undefined (setting 'request')

Thinking maybe if there's no match that can just be swallowed, or do you see it as root problem it should be solved?