language bindings use zmq_strerror instead of strerror

bindings/cpp/zmq.hpp

@@ -41,14 +41,7 @@ namespace zmq
 
         virtual const char *what () const throw ()
         {
-#if defined _MSC_VER
-#pragma warning (push)
-#pragma warning (disable:4996)
-#endif
-            return strerror (errnum);
-#if defined _MSC_VER
-#pragma warning (pop)
-#endif
+            return zmq_strerror (errnum);
         }
 
     private: