locale.c: Move some code to a bit later

This is in preparation for a future commit to make the critical section
this comes after a bit larger, so move it to after what will be the new
critical section.

locale.c

@@ -4303,18 +4303,18 @@ S_my_langinfo_i(pTHX_
     retval = save_to_buffer(nl_langinfo(item), retbufp, retbuf_sizep);
     gwLOCALE_UNLOCK;
 
-    if (utf8ness) {
-        *utf8ness = get_locale_string_utf8ness_i(retval,
-                                                 LOCALE_UTF8NESS_UNKNOWN,
-                                                 locale, cat_index);
-    }
-
     restore_toggled_locale_i(cat_index, orig_switched_locale);
 
 #    ifdef USE_LOCALE_CTYPE
     restore_toggled_locale_c(LC_CTYPE, orig_CTYPE_locale);
 #    endif
 
+    if (utf8ness) {
+        *utf8ness = get_locale_string_utf8ness_i(retval,
+                                                 LOCALE_UTF8NESS_UNKNOWN,
+                                                 locale, cat_index);
+    }
+
     return retval;
 /*--------------------------------------------------------------------------*/
 #  else   /* Below, emulate nl_langinfo as best we can */