xfs_scrub: fix erroring out of check_inode_names

xfs_scrub: fix erroring out of check_inode_names

The early exit logic in this function is a bit suboptimal -- we don't
need to close the @fd if we haven't even opened it, and since all errors
are fatal, we don't need to bump the progress counter.  The logic in
this function is about to get more involved due to the addition of the
directory tree structure checker, so clean up these warts.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>