Add definition of U_ for --disable-nsl

Don't define warning_gettext if --disable-nsl
Bug #621; from Daniel Richard G.

include/gettext.h

@@ -64,6 +64,7 @@
  */
 # define _(String) String 
 # define N_(String) String
+# define U_(String) String
 # define textdomain(Domain)
 # define bindtextdomain(Package, Directory)
 # define ngettext(String, String_Plural, N) \

plugins/sudoers/locale.c

@@ -108,6 +108,7 @@ sudoers_setlocale(int newlocale, int *prevlocale)
     return res ? true : false;
 }
 
+#ifdef HAVE_LIBINTL_H
 char *
 warning_gettext(const char *msgid)
 {
@@ -120,3 +121,4 @@ warning_gettext(const char *msgid)
 
     return msg;
 }
+#endif /* HAVE_LIBINTL_H */

src/locale_stub.c

@@ -25,9 +25,11 @@
 #include "fatal.h"
 #include "gettext.h"
 
+#ifdef HAVE_LIBINTL_H
 /* No need to swap locales in the front end. */
 char *
 warning_gettext(const char *msgid)
 {
     return gettext(msgid);
 }
+#endif /* HAVE_LIBINTL_H */