fix mtp run error

vllm/spec_decode/spec_decode_worker.py

@@ -434,7 +434,7 @@ class SpecDecodeWorker(LoRANotSupportedWorkerBase):
         
         # tree_style decoding modify probs in _verify_tokens
         if not self.tree_decoding:
-            (self.scorer_worker.model_runner.model.sampler.
+            (self.scorer_worker.model_runner.sampler.
             should_modify_greedy_probs_inplace) = True
         self.proposer_worker.set_include_gpu_probs_tensor()
         self.proposer_worker.set_should_modify_greedy_probs_inplace()