$NetBSD: patch-libraries_terminfo_configure.ac,v 1.2 2023/11/02 15:29:31 pho Exp $

Don't use "==" as it's a Bash-ism:
https://github.com/judah/terminfo/commit/09fe6ebe02d439c507c0bad6e500c9212f56e8e3

--- libraries/terminfo/configure.ac.orig	2023-10-23 02:48:49.253512773 +0000
+++ libraries/terminfo/configure.ac
@@ -18,7 +18,7 @@ if test "x$curses_libraries" != "xNONE";
   TERMINFO_LIB_DIRS=$curses_libraries
 fi
 
-if test "x$curses_library" == "xNONE"; then
+if test "x$curses_library" = "xNONE"; then
 AC_PROG_CC()
 
 AC_CHECK_LIB(tinfow, setupterm, HaveLibCurses=YES; LibCurses=tinfow,