ncurses 5.7 - patch 20081129

ncurses 5.7 - patch 20081129

+ improve a workaround in adding wide-characters, when a control
  character is found.  The library (cf: 20040207) uses unctrl() to
  obtain a printable version of the control character, but was not
  passing color or video attributes.
+ improve test/ncurses.c 'a' test, using unctrl() more consistently to
  display meta-characters.
+ turn on _XOPEN_CURSES definition in curses.h
+ add eterm-color entry (report by Vincent Lefevre) -TD
+ correct use of key_name() in test/ncurses.c 'A' test, which only
  displays wide-characters, not key-codes since 20070612 (report by
  Ricardo Cantu).