bug#7547: 24.0.50; verify-visited-file-modtime no longer returns t for non-existent file

[Glenn Morris]

Andreas Schwab wrote:

>>            && (st.st_mtime == b->modtime + 1
>>                || st.st_mtime == b->modtime - 1)))
>>         && (st.st_size == b->modtime_size
>> !           || b->modtime_size < 0 || st.st_mtime < 0))
>
> time_t may be unsigned, thus (time_t)-1 may be > 0.

I don't understand this comment.

If there is someone who knows how to fix this issue, please do so.