[PKT_SCHED]: Fix oops in ipt action error path.

This patch fixes an oops when the ipt action is used with a
non-existant iptables target. It tries to log
t->u.kernel.target->name, u.kernel.target is part of a union
and as long as the target wasn't successfully loaded contains
the name of the target, using it as a pointer results in a
crash.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/ipt.c

@@ -63,8 +63,7 @@ init_targ(struct tcf_ipt *p)
 	target = __ipt_find_target_lock(t->u.user.name, &ret);
 
 	if (!target) {
-		printk("init_targ: Failed to find %s\n",
-		       t->u.kernel.target->name);
+		printk("init_targ: Failed to find %s\n", t->u.user.name);
 		return -1;
 	}