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Re: use of %n in genmodes.c causes trouble on Vista

> I think a sprintf followed by a strlen and printf is _guarenteed_ to be much 
> more portable than printf's return value. The overhead of the strlen is 
> minimal.

Maybe portable, but how do you choose the length of the buffer to pass
to sprintf!  Ironic: we'd be trading a mostly-bogus security issue for
a buffer overflow problem.
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