Fix the building issue when protobuf is enabled.

Fu Juntang

2021-09-01 387fe1dbfffdc3d73cf46f2c054f4d25543c8523

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ipcrm -a
rm *.txt
./test_lostdata
sort -n c.txt  > c1.txt
sort -n p.txt  > p1.txt
diff -u p1.txt c1.txt