In bump-to-19.py, don't fail on missing pristine dir, as that's a legitimate state if there are no versioned files that have bases in this WC dir.  Also make sure to delete the pristine dir; previously it was only deleted if any files had been moved from it.
In bump-to-19.py, don't fail on missing pristine dir, as that's a legitimate
state if there are no versioned files that have bases in this WC dir.  Also
make sure to delete the pristine dir; previously it was only deleted if any
files had been moved from it.

* tools/dev/wc-ng/bump-to-19.py
  (move_and_shard_pristine_files): If there is no 'pristine' dir, just
    return successfully.
  (shard_pristine_files): Remove, as we can use move_and_shard_pristine_files()
    instead.
  (migrate_wc_subdirs): Remove the old pristine dir if it still exists.
  (__main__): Use move_and_shard_pristine_files() instead of
    shard_pristine_files(), for simplicity.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@991223 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion