6736061 recursive rename of snapshot fails if child snapshot doesn't exist

[matthew.ahr...@sun.com]

Author: Matthew Ahrens <Matthew.Ahrens at Sun.COM>
Repository: /hg/onnv/onnv-gate
Latest revision: 3992f9a413c2bd922f6783c3a3b6969e57c85c3e
Total changesets: 1
Log message:
6736061 recursive rename of snapshot fails if child snapshot doesn't exist

Files:
        update: usr/src/uts/common/fs/zfs/dsl_dataset.c