Make ToLua require a sized type.
Make ToLua require a sized type.

SpaceManiac/rust-lua53,SpaceManiac/rust-lua53,SpaceManiac/rust-lua53,jcmoyer/rust-lua53,SpaceManiac/rust-lua53,jcmoyer/rust-lua53,mneumann/rust-lua53,mneumann/rust-lua53,jcmoyer/rust-lua53,jcmoyer/rust-lua53