Fix/casting conversion warnings #2913

Job	Run time
build-msvc (meson, windows-2022)	18s
build-macos (macos-13)	30s
build-macos (macos-13, gcc@11)	32s
build-macos (macos-14)	22s
build-linux (jammy, 96b_carbon)	1s
build-macos (macos-13, gcc@12)	32s
build-mingw (windows-2022, mingw64)	13s
build-macos (macos-latest)	34s
build-linux (jammy, blackpill-f401cc)	1s
build-macos (macos-13, gcc@13)	1s
build-mingw (windows-2022, ucrt64)	16s
build-linux (jammy, blackpill-f401ce)	1s
build-macos (macos-13, gcc@14)	1s
build-mingw (windows-2022, clang64)	12s
build-linux (jammy, blackpill-f411ce)	1s
size-diff	33s
build-macos (macos-14, gcc@11)	1s
build-linux (jammy, bluepill)	1s
build-macos (macos-14, gcc@12)	1s
build-linux (jammy, ctxlink)	1s
build-macos (macos-14, gcc@13)	1s
build-linux (jammy, f072)	1s
build-macos (macos-14, gcc@14)	1s
build-linux (jammy, f3)	1s
build-linux (jammy, f4discovery)	1s
build-linux (jammy, hydrabus)	21s
build-linux (jammy, launchpad-icdi)	19s
build-linux (jammy, native)	19s
build-linux (jammy, native-uncommon)	18s
build-linux (jammy, native-st-clones)	32s
build-linux (jammy, native-riscv)	32s
build-linux (jammy, native-remote)	21s
build-linux (jammy, stlink)	19s
build-linux (jammy, stlinkv3)	19s
build-linux (jammy, swlink)	1s
	7m 38s

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