-/* Copyright (C) 1996, 1997, 2005 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
do
{
- if (__builtin_expect (destlen-- == 0, 0))
+ if (__glibc_unlikely (destlen-- == 0))
__chk_fail ();
c = wcp[off];
*++wcp = c;