btrfs: Remove extra parentheses from condition in copy_items()

commit 0dde10bed2c44a4024eb446cc72fe4e0cb97ec06 upstream.

There is no need for the extra pair of parentheses, remove it. This
fixes the following warning when building with clang:

fs/btrfs/tree-log.c:3694:10: warning: equality comparison with extraneous
  parentheses [-Wparentheses-equality]
                if ((i == (nr - 1)))
                     ~~^~~~~~~~~~~

Also remove the unnecessary parentheses around the substraction.

Change-Id: I4a060e767a2da8b9ef74a83e2919e64a437fe714
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: David Sterba <dsterba@suse.com>
Cc: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Git-repo: https://source.codeaurora.org/quic/la/kernel/msm-4.4


Git-commit: e7f42b03fbfb8309a2169aa7c1917b366a886506
Signed-off-by: Swetha Chikkaboraiah <schikk@codeaurora.org>