debugfs: fix icheck finding blocks used for xattrs

This was an "uninitialized variable" warning, but it turns out to be
a real bug.  Without this change, it is not possible to use "icheck"
to find blocks that are used for the i_file_acl (xattr) block.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
1 file changed