Remove HAVE_LIBNCURSES; it is required to be true

Also, it was a confusing name, since it does not necessarily mean that
we literally have libncurses; rather that we have tputs etc.

* configure.in (HAVE_LIBNCURSES): Remove; it is required to be true.

* src/dispnew.c: Remove HAVE_LIBNCURSES test;
it is always true on relevant platforms.

* nt/config.nt (HAVE_LIBNCURSES): Remove undef; not needed.

2 files changed, 7 insertions, 3 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index f1e175a968d..c02d919a2e2 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,8 @@
 2012-05-01  Glenn Morris  <rgm@gnu.org>
 
+        * dispnew.c: Remove HAVE_LIBNCURSES test;
+        it is always true on relevant platforms.
+
         * Makefile.in (LD_SWITCH_X_SITE_RPATH):
         Rename from LD_SWITCH_X_SITE_AUX_RPATH.
 
diff --git a/src/dispnew.c b/src/dispnew.c
index b313852efe2..a50877a6a90 100644
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -1,5 +1,6 @@
 /* Updating of data structures for redisplay.
-   Copyright (C) 1985-1988, 1993-1995, 1997-2012 Free Software Foundation, Inc.
+
+Copyright (C) 1985-1988, 1993-1995, 1997-2012 Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -87,7 +88,7 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #endif
 #endif /* not __GNU_LIBRARY__ */
 
-#if defined (HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
+#if defined (HAVE_TERM_H) && defined (GNU_LINUX)
 #include <term.h>               /* for tgetent */
 #endif
 
@@ -6303,7 +6304,7 @@ init_display (void)
 #ifdef HAVE_X11
       Vwindow_system_version = make_number (11);
 #endif
-#if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
+#ifdef GNU_LINUX
       /* In some versions of ncurses,
          tputs crashes if we have not called tgetent.
          So call tgetent.  */