Amy can hit enemies while not in a spin state after going off a chain

When Amy jumps off a CEZ Chain, she enters a spin state and can bounce off enemies - cool. If you use the twinspin after jumping off a chain, she visually leaves her spin state after the twinspin is over, but is able to bounce off enemies as if she were still spinning.

Thanks! I've fixed this bug here: https://git.magicalgirl.moe/STJr/SRB2/merge_requests/908