fix compilation on x86 #218

Job	Run time
check x86	55s
SIMD +sse4.2 on stable	20s
SIMD +sse4.2 on stable	21s
Test aarch64 (neon)	40s
SIMD +avx2 on stable	23s
Test with Miri	42s
SIMD +avx2 on stable	34s
clippy_check	17s
SIMD +sse4.2,+avx2 on stable	34s
SIMD +sse4.2,+avx2 on stable	22s
msrv (aarch64)	1m 17s
SIMD +sse4.2 on beta	27s
msrv (x64)	55s
SIMD +sse4.2 on beta	30s
SIMD +avx2 on beta	34s
Test stable on ubuntu-latest	23s
SIMD +avx2 on beta	27s
Test stable on windows-latest	2m 7s
Test stable on macOS-latest	36s
SIMD +sse4.2,+avx2 on beta	27s
Test beta on ubuntu-latest	27s
SIMD +sse4.2,+avx2 on beta	29s
SIMD +sse4.2 on nightly	29s
Test beta on windows-latest	1m 9s
Test beta on macOS-latest	1m 7s
SIMD +sse4.2 on nightly	30s
Test nightly on ubuntu-latest	29s
SIMD +avx2 on nightly	29s
Test nightly on windows-latest	1m 15s
SIMD +avx2 on nightly	29s
Test nightly on macOS-latest	33s
SIMD +sse4.2,+avx2 on nightly	27s
SIMD +sse4.2,+avx2 on nightly	29s
CI is green	0s
	21m 13s

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