BZ #13908 Fix mktemp attribute and comment

[Paul Eggert]

On 04/04/2012 08:58 AM, Carlos O'Donell wrote:

> Is there some common idiom that is used by developers which triggers a
> warning when it shouldn't?

It's the typical way mktemp should be used.  Here's an example, from
<http://stuff.mit.edu/afs/athena/astaff/project/opssrc/cups/foomatic-filters-4.0.3/pdf.c>:

    snprintf(filename, PATH_MAX, "%s/foomatic-XXXXXX", temp_dir());
    mktemp(filename);
    if (!filename[0])
        return 0;

> Is this with a recent GCC?

It should be with any gcc that supports __wur, no?