git: sys/vfs/hammer: Fix comments

[Tomohiro Kusumi]

commit 13c9bf36fcefc05aa5c9a8894353bb1d8a8ad289
Author: Tomohiro Kusumi <kusumi.tomohiro at gmail.com>
Date:   Sun Jul 12 12:15:34 2015 +0900

    sys/vfs/hammer: Fix comments
    
    - hammer_fsbuf_head only existed in the early days of hammer.

Summary of changes:
 sys/vfs/hammer/hammer_disk.h | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/13c9bf36fcefc05aa5c9a8894353bb1d8a8ad289


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