git: Use NULL instead of 0 for the third argument in fts_open()

[Aaron LI]

commit d619e025ea9b7f9a4839b4f08e7de380eef22459
Author: Aaron LI <aly at aaronly.me>
Date:   Sat Jun 15 18:55:11 2019 +0800

    Use NULL instead of 0 for the third argument in fts_open()
    
    Bug-report: #3138

Summary of changes:
 bin/chmod/chmod.c         | 2 +-
 usr.bin/chflags/chflags.c | 2 +-
 usr.sbin/chown/chown.c    | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/d619e025ea9b7f9a4839b4f08e7de380eef22459


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