fix struct file leakage

2.6.16 leaks like hell. While testing, I found massive filp leakage
(reproduced in openvz) in the bowels of namei.c.
Signed-off-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

fs/namei.c

@@ -1708,8 +1708,14 @@ int open_namei(int dfd, const char *pathname, int flag,
 	if (error)
 		goto exit_dput;
 	error = __do_follow_link(&path, nd);
-	if (error)
+	if (error) {
+		/* Does someone understand code flow here? Or it is only
+		 * me so stupid? Anathema to whoever designed this non-sense
+		 * with "intent.open".
+		 */
+		release_open_intent(nd);
 		return error;
+	}
 	nd->flags &= ~LOOKUP_PARENT;
 	if (nd->last_type == LAST_BIND)
 		goto ok;