Fix inode_orphan_handler issues.

Fix inode_orphan_handler issues.

1/ a stray ';' caused a while loop not to work.

2/ If the for loop finds a block with a 'primary' reference,
  just incorporating it won't help.  We need to find the last
  block so we know it has not primary reference, so it will
  get unpinned by the lafs_cluster_allocate call, and so
  will remove the primary reference.

Signed-off-by: NeilBrown <neilb@suse.de>