🐛 Fix padding mask calculation #2
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This PR updates the padding mask calculation to be the same as the one in the reference Wav2Vec2 implementation (same commit as listed in SEW's README): https://github.com/pytorch/fairseq/blob/05255f96410e5b1eaf3bf59b767d5b4b7e2c3a35/fairseq/models/wav2vec/wav2vec2.py#L477
For more details on how and why it was fixed in
fairseq, check out this PR by @patrickvonplaten facebookresearch/fairseq#3228