Add RNN LM rescore for offline ASR with modified_beam_search (#125)

sherpa-onnx/csrc/sherpa-onnx-offline.cc

@@ -111,6 +111,9 @@ for a list of pre-trained models to download.
 
   fprintf(stderr, "num threads: %d\n", config.model_config.num_threads);
   fprintf(stderr, "decoding method: %s\n", config.decoding_method.c_str());
+  if (config.decoding_method == "modified_beam_search") {
+    fprintf(stderr, "max active paths: %d\n", config.max_active_paths);
+  }
 
   fprintf(stderr, "Elapsed seconds: %.3f s\n", elapsed_seconds);
   float rtf = elapsed_seconds / duration;