According to current implementation, template method message::get(size_t) can be const method since the method change nothing in the object itself.
This patch just changes current template method to const and user can call the method for const zmqpp::message objects.
According to current implementation, template method message::get(size_t) can be const method since the method change nothing in the object itself. This patch just changes current template method to const and user can call the method for const zmqpp::message objects.