Re: [PATCH v3] bugreport.c: fix a crash in `git bugreport` with `--no-suffix` option

> executing `git bugreport --no-suffix` led to a segmentation fault
> due to strbuf_addftime() being called with a NULL option_suffix
> variable. This occurs because negating the "--[no-]suffix" option
> causes the parser to set option_suffix to NULL, which is not
> handled prior to calling strbuf_addftime().
>
> By adding a NULL check, the `--no-suffix` option is now available.
> Using this option disables the suffix, and the file is just named
> `git-bugreport` without any disambiguation measure.
>
> Signed-off-by: Jiamu Sun <barroit@linux.com>
> ---