Added virtual d'tor with throw spec which was not checked by MSVC

[SVN r76861]

include/boost/geometry/algorithms/detail/overlay/get_turn_info.hpp

@@ -36,6 +36,9 @@ public:
         message += method;
     }
 
+    virtual ~turn_info_exception() throw()
+    {}
+
     virtual char const* what() const throw()
     {
         return message.c_str();