fix MSVC breakage

Author: damageboy

bench/fullsort/BM_fullsort.vxsort.h

@@ -184,7 +184,11 @@ void register_type(i64 s, SortPattern p) {
     if constexpr (U >= 2) {
         register_type<M, U / 2, T>(s, p);
     }
+#ifdef VXSORT_COMPILER_MSVC
+    auto realname = typeid(T).name();
+#else
     auto realname = abi::__cxa_demangle(typeid(T).name(), nullptr, nullptr, nullptr);
+#endif
     auto bench_name = fmt::format("BM_vxsort_pattern<{}, {}, {}>/{}/{}", realname, U, s,
                                   magic_enum::enum_name(M), magic_enum::enum_name(p));
     ::benchmark::RegisterBenchmark(bench_name.c_str(), BM_vxsort_pattern<T, M, U>, s, p)