[PATCH] libstdc++: Fix testsuite with -Wformat

[Gwenole Beauchesne <gb.devel@gmail.com>]

Tested on x86_64-pc-linux-gnu with --enable-languages=c,c++ and
additional -Wformat to CXXFLAGS.

-- >8 --

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>
---
 .../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 518ddf49875..21f5263b5cc 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
 
-- 
2.39.2