Fix bug which could cause libblkid to loop forever

When revalidating a partition where there is obsolete information in
/etc/blkid.tab, we end up freeing a the type tag without clearing
dev->bid_type, causing blkid_verify() to loop forever.

Addresses-Debian-Bug: #432052

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
1 file changed