locale.c: Fix typo in #ifdef

This misspelling led to the code assuming that the platform didn't have
a feature that, if used, would result in faster execution.

diff --git a/locale.c b/locale.c
index 9500ab7..5970423 100644 (file)
--- a/locale.c
+++ b/locale.c
@@ -2621,7 +2621,7 @@ S_my_nl_langinfo(const int item, bool toggle)
 #if defined(HAS_NL_LANGINFO) /* nl_langinfo() is available.  */
 #  if   ! defined(HAS_THREAD_SAFE_NL_LANGINFO_L)      \
      || ! defined(HAS_POSIX_2008_LOCALE)              \
-     || ! defined(DUPLOCALE)
+     || ! defined(HAS_DUPLOCALE)
 
     /* Here, use plain nl_langinfo(), switching to the underlying LC_NUMERIC
      * for those items dependent on it.  This must be copied to a buffer before