set default casing to NULL, check for empty casing name in range.cpp
Allow vehicle interaction from inside if not driving or moving.
Allow butchering inside vehicle so long as not driving.
Merge pull request #4594 from BevapDin/fix-spawn-of-none-casing

set default casing to NULL, check for empty casing name in range.cpp
Merge pull request #4631 from yobbobanana/veh_interact_from_inside

Allow vehicle examining and butchering from inside vehicles.