Disabled warning C4459 on MSVC, caused by Asio

Author: anarthal

test/Jamfile

@@ -59,8 +59,9 @@ local requirements =
         <define>BOOST_ASIO_HAS_DEFAULT_FUNCTION_TEMPLATE_ARGUMENTS=1
         <define>BOOST_ALLOW_DEPRECATED_HEADERS=1
         # Disable warning C4702: unreachable code, produced by Boost.Asio buffer.hpp
+        # Disable warning C4459: declaration xxx hides global declaration, produced by Boost.Asio win_iocp_file_service.ipp
         # Remove /wd4100 when PFR fixes warnings
-        <toolset>msvc:<cxxflags>"/bigobj /wd4702 /wd4100 /permissive-"
+        <toolset>msvc:<cxxflags>"/bigobj /wd4702 /wd4100 /wd4459 /permissive-"
         <toolset>msvc:<define>_SCL_SECURE_NO_WARNINGS=1
         <toolset>msvc:<define>_SILENCE_CXX17_ALLOCATOR_VOID_DEPRECATION_WARNING
         <toolset>msvc:<define>_SILENCE_CXX17_ADAPTOR_TYPEDEFS_DEPRECATION_WARNING