xfs_repair: Search for conflicts in inode_tree_ptrs[] when processing uncertain inodes

When processing an uncertain inode chunk record, if we lose 2 blocks worth of
inodes or 25% of the chunk, xfs_repair decides to ignore the chunk. Otherwise,
xfs_repair adds a new chunk record to inode_tree_ptrs[agno], marking each
inode as either free or used. However, before adding the new chunk record,
xfs_repair has to check for the existance of a conflicting record.

The existing code incorrectly checks for the conflicting record in
inode_uncertain_tree_ptrs[agno]. This check will succeed since the inode chunk
record being processed was originally obtained from
inode_uncertain_tree_ptrs[agno].

This commit fixes the bug by changing xfs_repair to search
inode_tree_ptrs[agno] for conflicts.

Signed-off-by: Chandan Babu R <chandan.babu@oracle.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>