console displaying quote character from gcc wongly

console displaying quote character from gcc wongly

After an upgrade to debian wheezy my text consoles display questions marks
where there should be a quote
Under X I see things correctly
window.cpp:1056:21: error: base operand of '->' is not a pointer
but the console shows
window.cpp:1056:21: error: base operand of ?->? is not a pointer
If I remove everything from that file except the quote and put xy around
it (to spot it more easily), then emacs hexl-mode tells me it is this
character
00000000: 78e2 8098 790a x...y.
I understand 78 (x), 79(y) and 0a (LF) but I have trouble to believe that
something as simple as a quote requires three unicode bytes.
I also tried
dpkg-reconfigure console-setup
and managed to produce more unreadable characters, but did not succeed to
see the quotes correctly. I can type a single quote no problem and
manpages and everything look okay, so I don't know whether gcc or the
console is to blame.