Fix warning caused by platforms providing a signed wint_t

llvm-svn: 290477

1 files changed, 2 insertions, 1 deletions

diff --git a/libcxx/test/std/input.output/file.streams/fstreams/filebuf.virtuals/underflow.pass.cpp b/libcxx/test/std/input.output/file.streams/fstreams/filebuf.virtuals/underflow.pass.cpp
index 0c513806303..3c9c0d35db2 100644
--- a/libcxx/test/std/input.output/file.streams/fstreams/filebuf.virtuals/underflow.pass.cpp
+++ b/libcxx/test/std/input.output/file.streams/fstreams/filebuf.virtuals/underflow.pass.cpp
@@ -112,6 +112,7 @@ int main()
         assert(f.egptr() - f.gptr() == 1);
     }
     {
+        typedef std::char_traits<wchar_t> Traits;
         test_buf<wchar_t> f;
         f.pubimbue(std::locale(LOCALE_en_US_UTF_8));
         assert(f.open("underflow_utf8.dat", std::ios_base::in) != 0);
@@ -119,6 +120,6 @@ int main()
         assert(f.sbumpc() == 0x4E51);
         assert(f.sbumpc() == 0x4E52);
         assert(f.sbumpc() == 0x4E53);
-        assert(f.sbumpc() == static_cast<unsigned>(-1));
+        assert(f.sbumpc() == static_cast<Traits::int_type>(-1));
     }
 }