文本识别模型SRN转为推理模型执行predict_rec.py报错，CRNN正常

[InferMaster]

请提供下述完整信息以便快速定位问题/Please provide the following information to quickly locate the problem

• 系统环境/System Environment：ubuntu 18.04
• 版本号/Version：Paddle： PaddleOCR： 问题相关组件/Related components：
• 运行指令/Command Code：
• python tools/infer/predict_rec.py --image_dir="/root/autodl-tmp/paddleocr-2.2_MaxLen/dataset/rec/infer/58.jpg" --rec_model_dir="/root/autodl-tmp/paddleocr-2.2_MaxLen/inference/rec/srn" --rec_algorithm="SRN"
• 完整报错/Complete Error Message： InvalidArgumentError: The 'shape' attribute in ReshapeOp is invalid. The input tensor X'size must be divisible by known capacity of 'shape'. But received X's shape = [1, 512, 4, 40], X's size = 81920, 'shape' is [-1, 512, 256], known capacity of 'shape' is -131072. [Hint: Expected output_shape[unk_dim_idx] * capacity == -in_size, but received output_shape[unk_dim_idx] * capacity:0 != -in_size:-81920.] (at ..\paddle/fluid/operators/reshape_op.cc:190) [operator < reshape2 > error]