You can now install either libncurses5-dev:amd64 or libncurses5-dev:i386 with
sudo aptitude install libncurses5-dev:i386 libncurses5-dev- or sudo aptitude install libncurses5-dev:i386- lilbncurses5-dev
You can now install either libncurses5- dev:amd64 or libncurses5- dev:i386 with
sudo aptitude install libncurses5- dev:i386 libncurses5-dev- dev:i386- lilbncurses5-dev
or
sudo aptitude install libncurses5-