[gtkmm] assigning ustring from raw data

[Marc Canaleta <mcanaleta telefonica net>]

Hi people,

I'm using gtkmm whith libqxx. I get query results as char arrays (char*) 
already encoded as UTF-8, but i don't know how to create ustrings from 
encoded utf8, the assignment operator gives me warnings and the strings 
are truncated when there appears a character whith accent, for example. 
What is the way to do it?

Thanks.