Hello,

curses_keys.h is using obscure constant values while the curses.h header
provides fine defines, let's use the latter.

To be applied on top of my previous patch.

Samuel
Signed-off-by: NSamuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: NAndrzej Zaborowski <andrew.zaborowski@intel.com>