fix compiler warning #397

Job	Run time
macosx	2m 2s
lint	2m 7s
coverage - measure	2m 1s
sanitizer - debian:trixie	1m 24s
vcpkg - linux \|	2m 16s
vcpkg - ios \| Release	2m 3s
msys2 - mingw32	2m 23s
vcpkg - windows	2m 18s
conan - emscripten \|	2m 5s
msys2 - mingw64	2m 43s
sanitizer - arm64v8/debian:trixie	2m 10s
conan - linux \|	1m 55s
android	4m 20s
vcpkg - ios \| Debug	2m 1s
conan - macos-latest	2m 15s
sanitizer - arm32v7/debian:trixie	2m 41s
linux - arm64v8/debian:trixie	2m 24s
linux - arm32v7/debian:bookworm	2m 3s
linux - ubuntu:noble	1m 25s
linux - arm64v8/debian:bookworm	1m 51s
linux - debian:trixie	1m 42s
linux - debian:bookworm	1m 20s
linux - arm32v7/debian:trixie	2m 21s
	49m 50s

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