Fix compilation on big-endian arches #33

Job	Run time
emulated (s390x)	22m 55s
darwin_arm (self-hosted, macOS, ARM64, 8.10.7)	35m 41s
emulated (ppc64le)	19m 26s
arm (arm32v7)	10m 23s
darwin_arm (self-hosted, macOS, ARM64, 9.2.8)	21m 8s
build (ubuntu-latest, 8.6, 3.8.1.0)	12m 22s
darwin_arm (self-hosted, macOS, ARM64, 9.4.7)	31m 51s
arm (arm64v8)	9m 3s
build (ubuntu-latest, 8.8, 3.8.1.0)	10m 57s
build (ubuntu-latest, 8.10, 3.8.1.0)	10m 41s
freebsd (self-hosted, FreeBSD, X64, 9.4.8)	8m 44s
i386	9m 24s
build (ubuntu-latest, 9.0, 3.8.1.0)	10m 46s
freebsd (self-hosted, FreeBSD, X64, 9.6.4)	6m 0s
build (ubuntu-latest, 9.2, 3.8.1.0)	9m 3s
build (ubuntu-latest, 9.4, 3.8.1.0)	10m 9s
build (ubuntu-latest, 9.6, 3.8.1.0)	8m 57s
build (ubuntu-latest, 9.8, 3.8.1.0)	10m 18s
build (macOS-12, 9.4, 3.8.1.0)	42m 26s
build (macOS-12, 9.6, 3.8.1.0)	59m 28s
build (windows-latest, 9.4, 3.8.1.0)	51m 41s
build (windows-latest, 9.6, 3.8.1.0)	46m 44s
	7h 38m 7s

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