Fixed casts from const to non-const pointers #40

Job	Run time
build-ubuntu (ubuntu-20.04, gcc-11, g++-11)	1m 29s
build-freebsd (freebsd, x86-64, 13.2, ubuntu-22.04)	5m 54s
build-macos (macos-11)	44s
build-ubuntu (ubuntu-22.04, gcc-12, g++-12)	1m 18s
build-alpine (x86_64, latest-stable)	32s
build-freebsd (freebsd, arm64, 13.2, ubuntu-22.04)	8m 50s
build-macos (macos-12)	59s
build-alpine (x86, latest-stable)	26s
build-macos (macos-13)	54s
build-alpine (aarch64, latest-stable)	3m 17s
build-windows-msbuild (x64, 2019, Visual Studio 16 2019, C:\Program Files (x86)\Microsoft Visual ...	1m 50s
build-windows-msys2 (gcc, g++)	5m 38s
build-alpine (armhf, latest-stable)	2m 26s
build-windows-msbuild (x64, 2022, Visual Studio 17 2022, C:\Program Files\Microsoft Visual Studio...	1m 48s
build-windows-msys2 (clang, clang++)	3m 47s
build-alpine (armv7, latest-stable)	2m 46s
build-windows-msbuild (Win32, 2019, Visual Studio 16 2019, C:\Program Files (x86)\Microsoft Visua...	2m 6s
build-alpine (ppc64le, latest-stable)	2m 11s
build-windows-msbuild (Win32, 2022, Visual Studio 17 2022, C:\Program Files\Microsoft Visual Stud...	2m 54s
build-alpine (riscv64, edge)	2m 45s
build-alpine (s390x, latest-stable)	3m 12s
	55m 46s

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