fix 0size problem in unzip-zip op (#10755)

Co-authored-by: zhangyuqin <zhangyuqin@baidu.com>

Author: A-nnonymous

slm/model_zoo/gpt-3/external_ops/token_dispatcher_utils/tokens_stable_unzip.cu

@@ -246,6 +246,7 @@ std::vector<paddle::Tensor> tokens_unzip_stable(
   }
   const int rows = X.shape()[0];  // 一般为seqlen
   const int cols = X.shape()[1];  // 一般为7168
+  if(rows==0)return;
   const int quanted_cols = (XScale) ? XScale->shape()[1] : 0;
   /*
   const int max_tokens_per_expert =

slm/model_zoo/gpt-3/external_ops/token_dispatcher_utils/tokens_unzip_and_zip.cu

@@ -747,6 +747,7 @@ std::vector<paddle::Tensor> tokens_zip(
            unzipped_tokens.dtype() == paddle::DataType::FLOAT32);
   const int rows = unzipped_tokens.shape()[0];       // seqlen
   const int cols = unzipped_tokens.shape()[1];       // 一般为7168
+  if(rows==0)return;
   const int topk = expert_routemap_topk.shape()[1];  // 一般为8