[PATCH] mac80211: fix printk warning on 64-bit

My AID message patch introduced a warning on 64-bit machines because ~
extends to unsigned long:

| net/mac80211/ieee80211_sta.c: In function ‘ieee80211_rx_mgmt_assoc_resp’:
| net/mac80211/ieee80211_sta.c:1187: warning: format ‘%d’ expects type ‘int’, but argument 7 has type ‘long unsigned int’

This fixes it by explicitly casting the result to u16 (which 'aid' is).
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/ieee80211_sta.c

@@ -1184,7 +1184,7 @@ static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
 	printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
 	       "status=%d aid=%d)\n",
 	       dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
-	       capab_info, status_code, aid & ~(BIT(15) | BIT(14)));
+	       capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
 
 	if (status_code != WLAN_STATUS_SUCCESS) {
 		printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",