can't train model because ph_seq is set to None

[tart]

I don't know enough about python to be able to fix this problem with a pr, so I hope this is descriptive enough

commit 7cd5771 adds wav_length to _infer_once, but doesn't change arguments provided in validation_step

SOFA/modules/task/forced_alignment.py

Lines 774 to 781 in 7cd5771

 _, _, _, _, _, ctc, fig = self._infer_once( 
     input_feature, 
     ph_seq_g2p, 
     None, 
     None, 
     True, 
     True, 
 ) 

this sets ph_seq to None, causing _infer_once to fail with a NoneType error when using train.py. I reverted back to commit 2591e98 and this error was resolved.

[suco]

I'm sorry for submitting the commit without adequate testing. I will be more careful in the future.

[tart]

don't worry about it! I'm really happy with the results I'm getting with SOFA so far! keep up the good work :)