[huhtenberg]

It's some old-ish Debian on x86. GCC is 4.3.2.

But this is a such commonly-recognized pitfall that I actually don't know a single modern production compiler that does not generate this warning.

(edit) Just checked 4.7.1 and it generates the warning.

[harrytuttle]

Thanks. I think this must be a config issue on this box. It makes me wonder what other warnings it is not telling me about.