staging: wlan-ng: Replace data type declaration with variable of same type in cfg80211.c

sizeof(var) instead of sizeof(struct XXX) is preferred.
Fix it in cfg80211.c file.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wlan-ng/cfg80211.c

@@ -323,7 +323,7 @@ static int prism2_scan(struct wiphy *wiphy,
 
 	priv->scan_request = request;
 
-	memset(&msg1, 0x00, sizeof(struct p80211msg_dot11req_scan));
+	memset(&msg1, 0x00, sizeof(msg1));
 	msg1.msgcode = DIDmsg_dot11req_scan;
 	msg1.bsstype.data = P80211ENUM_bsstype_any;