lcurses.c: Remove some casts to chtype that only cause trouble.
lcurses.c: Remove some casts to chtype that only cause trouble.

snegovick/luaposix,jimmyharris/luaposix,zevv/luaposix,rrthomas/luaposix,ardje/luaposix,jimmyharris/luaposix,snegovick/luaposix,zevv/luaposix,ardje/luaposix,rrthomas/luaposix,luaposix/luaposix