Fixed overflow #226

Job	Run time
cross +1.85 build armv7-unknown-linux-gnueabihf	1m 58s
cross +1.85 build aarch64-unknown-linux-gnu	13m 57s
cross +stable build riscv64gc-unknown-linux-gnu	1m 17s
cross +stable build armv7-unknown-linux-gnueabihf	4m 0s
cross +1.85 build riscv64gc-unknown-linux-gnu	1m 17s
cross +stable build aarch64-unknown-linux-gnu	4m 7s
	26m 36s

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