int to size_t

paddle/operators/detection_output_op.h

@@ -63,7 +63,7 @@ class DetectionOutputKernel : public framework::OpKernel<T> {
     float nms_threshold = context.template Attr<float>("nms_threshold");
     float confidence_threshold =
         context.template Attr<float>("confidence_threshold");
-    int batch_size = in_conf->dims()[1];
+    size_t batch_size = in_conf->dims()[1];
     int conf_sum_size = in_conf->numel();
     // for softmax
     std::vector<int64_t> conf_shape_softmax_vec(