dsa

lms: fix size of `otstype` (#875) #743

Job	Run time
build (thumbv7em-none-eabi, 1.81.0)	18s
test (ubuntu-latest, 1.81.0)	35s
build (thumbv7em-none-eabi, stable)	15s
build (wasm32-unknown-unknown, 1.81.0)	20s
test (ubuntu-latest, stable)	39s
build (wasm32-unknown-unknown, stable)	12s
test (macos-latest, 1.81.0)	47s
test (macos-latest, stable)	35s
test (windows-latest, 1.81.0)	1m 10s
test (windows-latest, stable)	1m 17s
	6m 8s

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