[gcc r12-7735] Avoid a warning of overflow

[Qian Jianhua <qianjh@gcc.gnu.org>]

https://gcc.gnu.org/g:2d810acbd2c0fb73939e5a38b68b22152a4f3cc9

commit r12-7735-g2d810acbd2c0fb73939e5a38b68b22152a4f3cc9
Author: Qian Jianhua <qianjh@cn.fujitsu.com>
Date:   Fri Mar 18 17:37:28 2022 +0800

    Avoid a warning of overflow
    
    This patch avoid a warning of "c-ada-spec.cc:1660:34: warning:
    'sprintf' may write a terminating nul past the end of the
    destination [-Wformat-overflow=]" when build GCC.
    
    gcc/c-family/ChangeLog:
    
            * c-ada-spec.cc: Change array length

Diff:
---
 gcc/c-family/c-ada-spec.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/c-family/c-ada-spec.cc b/gcc/c-family/c-ada-spec.cc
index 149d336ee96..aeb429136b6 100644
--- a/gcc/c-family/c-ada-spec.cc
+++ b/gcc/c-family/c-ada-spec.cc
@@ -1579,7 +1579,7 @@ dump_ada_function_declaration (pretty_printer *buffer, tree func,
   tree type = TREE_TYPE (func);
   tree arg = TYPE_ARG_TYPES (type);
   tree t;
-  char buf[17];
+  char buf[18];
   int num, num_args = 0, have_args = true, have_ellipsis = false;
 
   /* Compute number of arguments.  */