Use wrapping cast for #[smi] arguments #3542

Job	Run time
compute-jobs	2s
build-linux / linux test	3m 41s
build-linux / linux coverage	4m 8s
build-linux / linux lint	54s
build-linux / linux lint-deps	1m 43s
build-linux / linux test-miri	7m 4s
build-linux / linux test-ops	5m 52s
build-linux / linux test-publish	1m 34s
build-linux-arm / linux-arm test	6m 46s
build-linux-arm / linux-arm test-miri	12m 18s
build-linux-arm / linux-arm lint	1m 31s
build-linux-xl / linux-xl test-valgrind	25m 13s
build-macos / macos lint	1m 10s
build-macos / macos test	3m 25s
build-windows / windows lint	4m 22s
build-windows / windows test	11m 18s
success	1s
	1h 31m 2s

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