minor fixes

model.py

@@ -274,8 +274,8 @@ def _get_whisper_model(
     repo_id: str, decoding_method: str, num_active_paths: int
 ) -> sherpa_onnx.OfflineRecognizer:
     print(f"get {repo_id}")
-    assert repo_id in ("tiny.en", "base.en", "small.en", "medium.en"), repo_id
     name = repo_id.split("-")[1]
+    assert name in ("tiny.en", "base.en", "small.en", "medium.en"), repo_id
     print(f"name: {name}")
     full_repo_id = "csukuangfj/sherpa-onnx-whisper-" + name
     print(f"full repo id: {full_repo_id}")