[libxml++] Const correctness of write_to_...

[Loïc Joly <Loic Joly reportive com>]

Hello,

Is there any reason why the xmlpp::Document::write_to_... functions are not const ? I have a const refrence to an object that contains a xmlpp::Document, and I have to use ugly const_cast to be able to do what seems to me to be a non-modifying operation.

Regards,

-- 
Loïc