Fix Rustler binary deserialization. #105

Job	Run time
NIF 2.15 - x86_64-apple-darwin (macos-13)	7m 37s
NIF 2.15 - x86_64-unknown-linux-gnu (ubuntu-22.04)	3m 35s
NIF 2.15 - aarch64-apple-darwin (macos-13)	11m 58s
build and test	2h 22m 0s
generate checksums	0s
	2h 45m 10s

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