locale.c: Don't compile unused function

embed.fnc

@@ -4429,10 +4429,6 @@ S	|void	|populate_hash_from_C_localeconv			\
 				|const U32 which_mask			\
 				|NN const lconv_offset_t *strings[2]	\
 				|NN const lconv_offset_t *integers[2]
-S	|const char *|save_to_buffer					\
-				|NULLOK const char *string		\
-				|NULLOK char **buf			\
-				|NULLOK Size_t *buf_size
 S	|void	|set_save_buffer_min_size				\
 				|const Size_t min_len			\
 				|NULLOK char **buf			\
@@ -4486,6 +4482,10 @@ So	|void	|restore_toggled_locale_i				\
 				|const locale_category_index cat_index	\
 				|NULLOK const char *original_locale	\
 				|const line_t caller_line
+S	|const char *|save_to_buffer					\
+				|NULLOK const char *string		\
+				|NULLOK char **buf			\
+				|NULLOK Size_t *buf_size
 Sr	|void	|setlocale_failure_panic_via_i				\
 				|const locale_category_index cat_index	\
 				|NULLOK const char *current		\

embed.h

@@ -1317,7 +1317,6 @@
 #     define is_locale_utf8(a)                  S_is_locale_utf8(aTHX_ a)
 #     define my_localeconv(a)                   S_my_localeconv(aTHX_ a)
 #     define populate_hash_from_C_localeconv(a,b,c,d,e) S_populate_hash_from_C_localeconv(aTHX_ a,b,c,d,e)
-#     define save_to_buffer(a,b,c)              S_save_to_buffer(aTHX_ a,b,c)
 #     define set_save_buffer_min_size(a,b,c)    S_set_save_buffer_min_size(aTHX_ a,b,c)
 #     define strftime8(a,b,c,d,e)               S_strftime8(aTHX_ a,b,c,d,e)
 #     define strftime_tm(a,b)                   S_strftime_tm(aTHX_ a,b)
@@ -1333,6 +1332,7 @@
 #       define new_LC_ALL(a,b)                  S_new_LC_ALL(aTHX_ a,b)
 #       define output_check_environment_warning(a,b,c) S_output_check_environment_warning(aTHX_ a,b,c)
 #       define parse_LC_ALL_string(a,b,c,d,e,f) S_parse_LC_ALL_string(aTHX_ a,b,c,d,e,f)
+#       define save_to_buffer(a,b,c)            S_save_to_buffer(aTHX_ a,b,c)
 #       define setlocale_failure_panic_via_i(a,b,c,d,e,f,g) S_setlocale_failure_panic_via_i(aTHX_ a,b,c,d,e,f,g)
 #       if defined(DEBUGGING)
 #         define my_setlocale_debug_string_i(a,b,c,d) S_my_setlocale_debug_string_i(aTHX_ a,b,c,d)

locale.c

@@ -4801,6 +4801,8 @@ S_is_locale_utf8(pTHX_ const char * locale)
 
 #endif
 
+#ifdef USE_LOCALE
+
 STATIC void
 S_set_save_buffer_min_size(pTHX_ Size_t min_len,
                                  char **buf,
@@ -4888,6 +4890,7 @@ S_save_to_buffer(pTHX_ const char * string, char **buf, Size_t *buf_size)
     return *buf;
 }
 
+#endif
 #ifdef USE_LOCALE
 #  ifdef WIN32