[gcc r14-6971] libstdc++: Fix testsuite with -Wformat

[Jonathan Wakely <redi@gcc.gnu.org>]

https://gcc.gnu.org/g:ff981616a6093b7075581c45ad6240d86ebe6f3e

commit r14-6971-gff981616a6093b7075581c45ad6240d86ebe6f3e
Author: Gwenole Beauchesne <gb.devel@gmail.com>
Date:   Wed Dec 6 15:34:44 2023 +0100

    libstdc++: Fix testsuite with -Wformat
    
    Fix testsuite when compiling with -Wformat. Use nonnull arguments so
    that -Wformat does not cause extraneous output to be reported as an
    error.
    
    FAIL: tr1/8_c_compatibility/cinttypes/functions.cc (test for excess errors)
    
    libstdc++-v3/ChangeLog:
    
            * testsuite/tr1/8_c_compatibility/cinttypes/functions.cc: Use
            nonnull arguments to strtoimax() and wcstoimax() functions.
    
    Signed-off-by: Gwenole Beauchesne <gb.devel@gmail.com>

Diff:
---
 libstdc++-v3/testsuite/tr1/8_c_compatibility/cinttypes/functions.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libstdc++-v3/testsuite/tr1/8_c_compatibility/cinttypes/functions.cc b/libstdc++-v3/testsuite/tr1/8_c_compatibility/cinttypes/functions.cc
index e9eec57e896..b9a34d08a57 100644
--- a/libstdc++-v3/testsuite/tr1/8_c_compatibility/cinttypes/functions.cc
+++ b/libstdc++-v3/testsuite/tr1/8_c_compatibility/cinttypes/functions.cc
@@ -29,10 +29,10 @@ void test01()
 #if _GLIBCXX_USE_C99_INTTYPES_TR1
 
   std::tr1::intmax_t i = 0, numer = 0, denom = 0, base = 0;
-  const char* s = 0;
+  const char* s = "0";
   char** endptr = 0;
 #if defined(_GLIBCXX_USE_WCHAR_T) && _GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1
-  const wchar_t* ws = 0;
+  const wchar_t* ws = L"0";
   wchar_t** wendptr = 0;
 #endif