Minor follow-up fixes for the logprob refactor (#2670)

python/sglang/srt/sampling/sampling_batch_info.py

@@ -244,7 +244,7 @@ class SamplingBatchInfo:
 
         # repetition
         if self.scaling_penalties is not None:
-            logits = torch.where(
+            logits[:] = torch.where(
                 logits > 0,
                 logits / self.scaling_penalties,
                 logits * self.scaling_penalties,
@@ -253,5 +253,3 @@ class SamplingBatchInfo:
         # Apply regex vocab_mask
         if self.vocab_mask is not None:
             self.apply_mask(logits=logits, vocab_mask=self.vocab_mask)
-
-        return logits