fixe dataloader build bug when fine-tuning v1 model

Author: Plachtaa

data/ft_dataset.py

@@ -33,9 +33,9 @@ def __init__(
         self.sr = sr
         self.mel_fn_args = {
             "n_fft": spect_params['n_fft'],
-            "win_size": spect_params.get('win_length', spect_params['win_size']),
-            "hop_size": spect_params.get('hop_length', spect_params['hop_size']),
-            "num_mels": spect_params.get('n_mels', spect_params['num_mels']),
+            "win_size": spect_params.get('win_length', spect_params.get('win_size', 1024)),
+            "hop_size": spect_params.get('hop_length', spect_params.get('hop_size', 256)),
+            "num_mels": spect_params.get('n_mels', spect_params.get('num_mels', 80)),
             "sampling_rate": sr,
             "fmin": spect_params['fmin'],
             "fmax": None if spect_params['fmax'] == "None" else spect_params['fmax'],