fix dataset text filter bug

haoneng.lhn

2023-07-12 bcf3b486475fbb0a98d62280d47b9c1951368b8c

 funasr/export/export_model.py

@@ -192,6 +192,7 @@
                config, model_file, cmvn_file, 'cpu'
            )
            self.frontend = model.frontend
            self.export_config["feats_dim"] = 560
        elif mode.startswith('offline'):
            from funasr.tasks.vad import VADTask
            config = os.path.join(model_dir, 'vad.yaml')