Revert to using mem::transmute in Box::from_raw
Revert to using mem::transmute in Box::from_raw

Same reasons as commit 904133e1e28b690e2bbd101b719509aa897539a0.

GBGamer/rust,GBGamer/rust,GBGamer/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust