fix: Fix MSVC warnings #1576

Job	Run time
host_win_msvc	56s
host_win (x86_64)	1m 3s
coding_style	15s
host_arm (armv7, none, g++-10)	3m 16s
host_win (armv7)	55s
host_arm (armv7, none, clang++-11)	6m 6s
host_x86 (x86_64, g++-10)	1m 57s
host_win (aarch64)	59s
host_arm (aarch64, none, g++-10)	2m 42s
host_arm (aarch64, none, clang++-11)	4m 28s
host_x86 (x86_64, clang++-11)	33s
host_arm (aarch64, crypto+crc, g++-10)	3m 29s
host_arm (aarch64, crypto+crc, clang++-11)	4m 26s
test_win_msvc	1m 20s
	32m 25s

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