fix: msg_stamp.size() is unsigned,should convert to int (#2523)

TouchZZZ

2025-05-22 eccf74684743593950ad259877db7ce9ffc06e93

 funasr/models/ct_transformer/template.yaml

@@ -25,6 +25,7 @@
        - 1.0
        - 1.0
        - 1.0
    sentence_end_id: 3

encoder: SANMEncoder
encoder_conf: