Fixed bug that stopped npyscreen working on BW terminals.
Fixed bug that stopped npyscreen working on BW terminals.

dhwright25/npyscreen,monkeysecurity/npyscreen,dhwright25/npyscreen,t1g0r/npyscreen,dhwright25/npyscreen,monkeysecurity/npyscreen,C-Blu/npyscreen,monkeysecurity/npyscreen,umars/npyscreen,kmonsoor/npyscreen,C-Blu/npyscreen,umars/npyscreen,d33tah/npyscreen,t1g0r/npyscreen,t1g0r/npyscreen,d33tah/npyscreen,t1g0r/npyscreen,umars/npyscreen,kmonsoor/npyscreen,kmonsoor/npyscreen,monkeysecurity/npyscreen,C-Blu/npyscreen,umars/npyscreen,kmonsoor/npyscreen,C-Blu/npyscreen