Fix building for wasm32 emscripten #299

Job	Run time
test-conda-env (macos-14, --features use-system-blosc2)	1m 25s
test-native (macos-13)	3m 41s
test-cross (x86_64-unknown-linux-musl)	2m 4s
test-wasm32-emscripten (static)	1m 7s
test-conda-env (windows-latest, --features use-system-blosc2)	2m 34s
test-native (macos-14)	2m 7s
test-cross (s390x-unknown-linux-gnu)	1m 58s
test-conda-env (ubuntu-latest, --features use-system-blosc2)	1m 12s
test-native (windows-latest)	5m 50s
test-wasm32-emscripten (shared)	1m 13s
test-native (ubuntu-latest)	2m 0s
	25m 11s

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