Makes datarate errors debug only on decode (#468) #1248

Job	Run time
hygiene	46s
build (arm-unknown-linux-gnueabihf)	2m 38s
build (armv5te-unknown-linux-musleabi)	2m 48s
build (armv7-unknown-linux-musleabihf)	3m 7s
build (aarch64-unknown-linux-musl)	2m 42s
build (mips-unknown-linux-musl)	3m 26s
build (mipsel-unknown-linux-musl)	3m 4s
build (x86_64-unknown-debian-gnu)	2m 43s
build (x86_64-tpm-debian-gnu)	3m 6s
docker_buildx	12m 4s
release	0s
	36m 24s

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