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>