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SubjectRe: macro conflict
Hi,

> sizeof() test isn't even needed due to promotion. Just the signs are
> important (afaik) and a test for pointer and integral mixing which I
> cann't think of. Maybe some clever use of arrays or "+ *x" or
> something.

Try '-W' or '-Wsign-compare'. pointer/integer compare already results in
a warning without any option.

bye, Roman
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