"word-level" doesn't always exist

[NodudeWasTaken]

I tried to translate from japanese to english and use whisperx.
In exactly one entry it's missing a "word-level" in it's alignment dict, causing utils.write_ass to fail.

Alignment output entry:

    {
        "id": 654,
        "seek": 518644,
        "start": 5198.74,
        "end": 5198.7404,
        "text": " Shizu",
        "tokens": [
            1160,
            590,
            84
        ],
        "temperature": 1,
        "avg_logprob": -4.464975124452172,
        "compression_ratio": 1.0123456790123457,
        "no_speech_prob": 0.07407991588115692
    },

[tomlinsonm]

Probably redundant, but it comes in when the segment has an invalid timestamp - either greater than max duration or smaller than the allowed precision.

[m-bain]

fixed in recent commit I think d395c21