K 10
svn:author
V 3
dim
K 8
svn:date
V 27
2022-07-29T18:50:35.615135Z
K 7
svn:log
V 565
Fix unused variable warning in ffs_snapshot.c

With clang 15, the following -Werror warning is produced:

    sys/ufs/ffs/ffs_snapshot.c:204:7: error: variable 'redo' set but not used [-Werror,-Wunused-but-set-variable]
            long redo = 0, snaplistsize = 0;
                 ^

The 'redo' variable is only used when DIAGNOSTIC is defined. Ensure it
is only declared and set in that case.

MFC after:	3 days

(cherry picked from commit c9dde6f0c713a027266c52cf94a33a086348c566)

Git Hash:   6ef6d3424f158a797d280ebd3103d4d833d41230
Git Author: dim@FreeBSD.org
END