patchsequencer: make sign_off_header a file local symbol

> Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
> ---
>
> Hi Miklos,
>
> If you need to re-roll your 'mv/cherry-pick-s' branch, could you
> please squash this into the relevant patch (commit 5ed75e2a3f,
> "cherry-pick: don't forget -s on failure", 14-09-2017).

>  sequencer.c | 2 +-
>  sequencer.h | 2 --
>  2 files changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/sequencer.c b/sequencer.c
> index 53b5100a7..b8c0ed170 100644
> --- a/sequencer.c
> +++ b/sequencer.c
> @@ -26,7 +26,7 @@
>  
>  #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
>  
> -const char sign_off_header[] = "Signed-off-by: ";
> +static const char sign_off_header[] = "Signed-off-by: ";
>  static const char cherry_picked_prefix[] = "(cherry picked from commit ";
>  
>  GIT_PATH_FUNC(git_path_seq_dir, "sequencer")
> diff --git a/sequencer.h b/sequencer.h
> index 77cb174b2..688b0276d 100644
> --- a/sequencer.h
> +++ b/sequencer.h
> @@ -53,8 +53,6 @@ int check_todo_list(void);
>  int skip_unnecessary_picks(void);
>  int rearrange_squash(void);
>  
> -extern const char sign_off_header[];
> -
>  void append_signoff(struct strbuf *msgbuf, int ignore_footer, unsigned flag);
>  void append_conflicts_hint(struct strbuf *msgbuf);
>  int git_sequencer_config(const char *k, const char *v, void *cb);

> Ramsay Jones <ramsay@ramsayjones.plus.com> writes:
>
>> Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
>> ---
>>
>> Hi Miklos,
>>
>> If you need to re-roll your 'mv/cherry-pick-s' branch, could you
>> please squash this into the relevant patch (commit 5ed75e2a3f,
>> "cherry-pick: don't forget -s on failure", 14-09-2017).
>
> What automated procedure are you using to produce these comments?
>
> The commit is from 14-09-2012, not from a few months ago, and is
> part of Git 1.8.0 and upwards, which won't be rerolled.  Please add
> a check to see if the culprit is already in 'next' or something.
>
> Will queue as _your_ fix, not a potential squash into another
> commit.
>
> Thanks, as always, for your attention to detail.

> Ramsay Jones <ramsay@ramsayjones.plus.com> writes:
> 
>> Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
>> ---
>>
>> Hi Miklos,
>>
>> If you need to re-roll your 'mv/cherry-pick-s' branch, could you
>> please squash this into the relevant patch (commit 5ed75e2a3f,
>> "cherry-pick: don't forget -s on failure", 14-09-2017).
> 
> What automated procedure are you using to produce these comments?