Aessafe: Use u16s instead of u32s to store the bitspliced state
Aessafe: Use u16s instead of u32s to store the bitspliced state

The top 16 bits of each u32 were unused, so, there was no need
to use u32s.

canndrew/rust-crypto,PeterReid/rust-crypto,andreasots/rust-crypto,exe-dealer/rust-md5,thinkingfish/rust-crypto,PeterReid/rust-crypto,nmathewson/rust-crypto,mseri/rust-crypto,andreasots/rust-crypto,canndrew/rust-crypto,DaGenix/rust-crypto,DaGenix/rust-crypto,tempbottle/rust-crypto,nmathewson/rust-crypto,tempbottle/rust-crypto,mseri/rust-crypto,thinkingfish/rust-crypto