From 3954096d4b1adab6fbb3c26de37ddd4f781e072f Mon Sep 17 00:00:00 2001
From: Alexander Block <ablock84@googlemail.com>
Date: Wed, 1 Aug 2012 12:46:05 +0200
Subject: [PATCH] Btrfs: fix check for changed extent in is_extent_unchanged

The previous check was working fine, but this check should be
easier to read. Also, we could theoritically have some exotic
bugs with the previous checks.

Signed-off-by: Alexander Block <ablock84@googlemail.com>
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