[AGENT++] MT-safety of get_printable() -- yet another approach

[maom_onet at poczta.onet.pl]

U�ytkownik Jochen Katz <katz at agentpp.com> napisa�:
>Hi all,
>
>at first I will modify all get_printable() functions to the behaviour of 
>the Address classes: only modify the buffer if the object was changed.
>
>The possible next step (maybe more comments on the list will change 
>this) would be to add a real in-any-case mt-safe get_printable() function.
>

Glad to hear this!

I think that at least 'const' member functions should together compose an MT-safe interface (that is, I believe it would be sufficient to guarantee MT-safety when an object is not modified).
 
Marek