Revert "libstdc++: Use unsigned char argument to std::isdigit"

This reverts commit d0d6ca019717305df0ef41e3fe1da48f7f561fac.

diff --git a/libstdc++-v3/include/std/charconv b/libstdc++-v3/include/std/charconv
index 571be075a6b35dd73407646945cbdbd875516751..193702e677a6af0c857e79a4a620d01227f4c1c2 100644 (file)
--- a/libstdc++-v3/include/std/charconv
+++ b/libstdc++-v3/include/std/charconv
@@ -565,7 +565,7 @@ namespace __detail
       while (__first != __last)
        {
          unsigned char __c = *__first;
-         if (std::isdigit(static_cast<unsigned char>(__c)))
+         if (std::isdigit(__c))
            __c -= '0';
          else
            {