Attempt to fix MSVC build failures

include/benchmark/benchmark_api.h

@@ -660,8 +660,10 @@ internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn) {
     return internal::RegisterBenchmarkInternal(
         ::new BenchType(name, std::forward<Lambda>(fn)));
 }
+#endif
 
-#if !defined(BENCHMARK_GCC_VERSION) || BENCHMARK_GCC_VERSION >= 409
+#if defined(BENCHMARK_HAS_CXX11) && \
+     (!defined(BENCHMARK_GCC_VERSION) || BENCHMARK_GCC_VERSION >= 409)
 template <class Lambda, class ...Args>
 internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn,
                                        Args&&... args) {
@@ -671,7 +673,7 @@ internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn,
 #else
 #define BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
 #endif
-#endif // BENCHMARK_HAS_CXX11
+
 
 // The base class for all fixture tests.
 class Fixture: public internal::Benchmark {