New ngettext stuff borks on UCLIBC, as ngettext do not have a !ENABLE_NLS
define.  Add a check for ngettext and add the ngettext define.  Both was
inspired by coreutils.

diff -urp shadow-4.0.11.1/configure.in shadow-4.0.11.1.az/configure.in
--- shadow-4.0.11.1/configure.in	2005-08-03 00:59:56.000000000 +0200
+++ shadow-4.0.11.1.az/configure.in	2005-08-03 12:04:55.000000000 +0200
@@ -280,6 +280,6 @@ if test "$with_libskey" = "yes"; then
 fi
 
 AM_GNU_GETTEXT_VERSION(0.12.1)
-AM_GNU_GETTEXT([external])
+AM_GNU_GETTEXT([external], [need-ngettext])
 
 AC_CONFIG_FILES([
 	Makefile
diff -urp shadow-4.0.11.1/lib/defines.h shadow-4.0.11.1.az/lib/defines.h
--- shadow-4.0.11.1/lib/defines.h	2005-06-14 22:27:48.000000000 +0200
+++ shadow-4.0.11.1.az/lib/defines.h	2005-08-03 12:06:42.000000000 +0200
@@ -24,6 +24,8 @@
 # undef textdomain
 # define textdomain(Domain)	/* empty */
 # define _(Text) Text
+# define ngettext(Msgid1, Msgid2, N) \
+    ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
 #endif
 
 #if STDC_HEADERS