Fix warnings on some compilers #652

Job	Run time
build-and-test / cmake-linux-riscv64	1s
build-and-test / cmake-linux-aarch64	1s
build-and-test / cmake-linux-x86_64	1s
build-and-test / cmake-windows-x64	1s
build-and-test / cmake-macos-arm64	19m 1s
build-and-test / cmake-windows-x86	1s
build-and-test / cmake-linux-riscv64-rvv	1s
build-and-test / cmake-linux-armhf	1s
build-and-test / cmake-windows-arm64	1s
build-and-test / cmake-android (arm64)	1s
build-and-test / cmake-android (x86)	1s
build-and-test / cmake-android (armv7)	1s
build-and-test / cmake-ios-x86_64	3m 26s
build-and-test / cmake-ios-arm64	2m 22s
build-and-test / bazel-linux-x86_64-clang-18	1s
build-and-test / bazel-linux-x86_64-gcc-9	1s
build-and-test / bazel-linux-aarch64-gcc13	1s
build-and-test / bazel-linux-aarch64-sme2-qemu	1s
build-and-test / bazel-linux-aarch64-clang18	1s
	25m 5s

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