namei: Remove extraneous rmdir

We just unlinked the file, so we know we won't be able to rmdir() the
same thing. Give a path one level higher to
namei_RemoveDataDirectories, so we start rmdir()ing at the parent dir.

Change-Id: Ifa54d1cc07ed2d277416d09eabc45aa1e1c3803a
Reviewed-on: http://gerrit.openafs.org/5833
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>

src/vol/namei_ops.c

@@ -1006,6 +1006,11 @@ namei_dec(IHandle_t * ih, Inode ino, int p1)
 		/* Try to remove directory. If it fails, that's ok.
 		 * Salvage will clean up.
 		 */
+		char *slash = strrchr(name.n_path, OS_DIRSEPC);
+		if (slash) {
+		    /* avoid an rmdir() on the file we just unlinked */
+		    *slash = '\0';
+		}
 		(void)namei_RemoveDataDirectories(&name);
 	    }
 	}