Apply patch for latest codegear compiler.

asio/include/asio/read_until.hpp

diff --git a/asio/include/asio/read_until.hpp b/asio/include/asio/read_until.hpp
index 69922e2..33a6a0c 100644
--- a/asio/include/asio/read_until.hpp
+++ b/asio/include/asio/read_until.hpp
@@ -24,6 +24,7 @@
 #include <boost/type_traits/is_function.hpp>
 #include <boost/type_traits/remove_pointer.hpp>
 #include <boost/utility/enable_if.hpp>
+#include <boost/detail/workaround.hpp>
 #include <string>
 #include "asio/detail/pop_options.hpp"
 
@@ -34,6 +35,20 @@
 
 namespace detail
 {
+#if BOOST_WORKAROUND(__CODEGEARC__, BOOST_TESTED_AT(0x610))
+  template <typename T>
+  struct has_result_type
+  {
+    template <typename U> struct inner
+    {
+        struct big { char a[100]; };
+        static big helper(U, ...);
+        static char helper(U, typename U::result_type* = 0);
+    };
+    static const T& ref();
+    enum { value = (sizeof((inner<const T&>::helper)((ref)())) == 1) };
+  };
+#else // BOOST_WORKAROUND(__CODEGEARC__, BOOST_TESTED_AT(0x610))
   template <typename T>
   struct has_result_type
   {
@@ -43,6 +58,7 @@
     static const T& ref();
     enum { value = (sizeof((helper)((ref)())) == 1) };
   };
+#endif // BOOST_WORKAROUND(__CODEGEARC__, BOOST_TESTED_AT(0x610))
 } // namespace detail
 
 /// Type trait used to determine whether a type can be used as a match condition