Windows: Missing DirEntry Ref incr AFSLocateName

Windows: Missing DirEntry Ref incr AFSLocateName

In the STATUS_NAME_COLLISION error path the DirEntry refcnt must
be incremented because it will be decremented before exit from
AFSLocateName().

Change-Id: I7cf976afa8e62d0d9803549b64a5d0dae27cd9b1
Reviewed-on: http://gerrit.openafs.org/8518
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>