fix typo

deploy/pdserving/ocr_cpp_client.py

@@ -49,5 +49,6 @@ for img_file in os.listdir(test_img_dir):
         feed={"x": image}, fetch=["save_infer_model/scale_0.tmp_1"], batch=True)
     one_batch_res = ocr_reader.postprocess(fetch_map, with_score=True)
     for res in one_batch_res:
+        res_list.append(res[0])
     res = {"res": str(res_list)}
     print(res)