FIX 'NoneType' object has no attribute 'isalpha' (#2440)

passerbya

2025-03-20 5ee2f382b32c5c0beaa1c133b466a100c6fb7ebc

 .gitignore

@@ -27,3 +27,4 @@
modelscope_models
examples/aishell/llm_asr_nar/*
*egg-info
env/