Fix throw_on_error direct call bug

test=develop

paddle/fluid/operators/distributed/proto_encoder_helper.h

@@ -84,7 +84,9 @@ class ProtoEncodeHelper {
   ~ProtoEncodeHelper() {
 #define REPLACE_ENFORCE_GLOG 1
     // Make sure callers didn't do operations that went over max_size promised
+    if (paddle::platform::is_error(p_ <= limit_)) {
       paddle::platform::throw_on_error(p_ <= limit_);
+    }
 #undef REPLACE_ENFORCE_GLOG
   }