[Bug c++/56658] Silent conversion between 'char' and 'int' even though there are 'signed char' and 'unsigned char' alternatives

[greenscape777 at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56658

--- Comment #3 from GS <greenscape777 at gmail dot com> 2013-03-20 15:07:00 UTC ---
What about warning? Would it be like harmful, or what?