blkid: have ntfs's UUID compatible with vol_id

Ensure the length of the UUID is always the same

without the patch:

% blkid /tmp/a /tmp/b
/tmp/a: UUID="7130E4771519577F" TYPE="ntfs"
/tmp/b: UUID="7E9B4A7CCE99CA" TYPE="ntfs"

with the patch:

% blkid /tmp/a /tmp/b
/tmp/a: UUID="7130E4771519577F" TYPE="ntfs"
/tmp/b: UUID="007E9B4A7CCE99CA" TYPE="ntfs"

ie same as:

% vol_id --uuid /tmp/a ; vol_id --uuid /tmp/b
7130E4771519577F
007E9B4A7CCE99CA

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