[glibc/azanella/clang] stdlib: Improve fortify with clang

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9c05e98b287ad3e734a59d33f6eda32d7eb7961e

commit 9c05e98b287ad3e734a59d33f6eda32d7eb7961e
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Tue Dec 5 10:36:15 2023 -0300

    stdlib: Improve fortify with clang
    
    It improve fortify checks for realpath, ptsname_r, wctomb, mbstowcs,
    and wcstombs.  The runtime and compile checks have similar coverage as
    with GCC.
    
    Checked on aarch64, armhf, x86_64, and i686.

Diff:
---
 stdlib/bits/stdlib.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/stdlib/bits/stdlib.h b/stdlib/bits/stdlib.h
index 1557b862b1..9e31801e80 100644
--- a/stdlib/bits/stdlib.h
+++ b/stdlib/bits/stdlib.h
@@ -135,6 +135,7 @@ __NTH (mbstowcs (__fortify_clang_overload_arg (wchar_t *, __restrict, __dst),
 {
   if (__builtin_constant_p (__dst == NULL) && __dst == NULL)
     return __mbstowcs_nulldst (__dst, __src, __len);
+
   else
     return __glibc_fortify_n (mbstowcs, __len, sizeof (wchar_t),
 			      __glibc_objsize (__dst), __dst, __src, __len);