Fix two compiler warnings that are new with recent versions of gcc
(apparently 4.2 and up).  One is fixed by refactoring; this change was
supplied by Stephen Hemminger.  The other was fixed by labelling the
variable as uninitialized_var() after confirming via inspection that it
cannot actually be used uninitialized.
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
                }
 
                if (!list_empty(&bond->vlan_list)) {
-                       unsigned short vlan_id;
-                       int res = vlan_get_tag(skb, &vlan_id);
-                       if (!res) {
+                       if (!vlan_get_tag(skb, &client_info->vlan_id))
                                client_info->tag = 1;
-                               client_info->vlan_id = vlan_id;
-                       }
                }
 
                if (!client_info->assigned) {
 
  */
 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev)
 {
-       unsigned short vlan_id;
+       unsigned short uninitialized_var(vlan_id);
 
        if (!list_empty(&bond->vlan_list) &&
            !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&