git: gpt(8): Minor tweaks to map.[ch]

[Aaron LI]

commit 565f0e2170b542dda8255df6946f5bca69921490
Author: Aaron LI <aly at aaronly.me>
Date:   Fri Aug 29 13:41:55 2025 +0800

    gpt(8): Minor tweaks to map.[ch]
    
    - Include <sys/types.h> for 'off_t'.
    - Return NULL intead of 0 for pointer return type.

Summary of changes:
 sbin/gpt/map.c | 4 ++--
 sbin/gpt/map.h | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/565f0e2170b542dda8255df6946f5bca69921490


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