Btrfs: avoid NULL pointer deref in try_release_extent_buffer
authorChris Mason <chris.mason@oracle.com>
Mon, 22 Nov 2010 03:27:44 +0000 (22:27 -0500)
committerChris Mason <chris.mason@oracle.com>
Mon, 22 Nov 2010 03:27:44 +0000 (22:27 -0500)
If we fail to find a pointer in the radix tree, don't try
to deref the NULL one we do have.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

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