convert.py : fix llama/llama2 conversion due to vocab_size=-1 - take 2 #5019
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PR #4818 (merged last week) reintroduced a config check for vocab_size that was addressed in PR #4258 (merged 2023-11-30).
Without the fix, llama2 models can't be converted. The error is:
ValueError: The model's vocab size is set to -1 in params.json. Please update it manually. Maybe 32000?