mac80211: trivial: use WLAN_BACK_RECIPIENT instead of hardcoded 0

  Use WLAN_BACK_RECIPIENT instead of hardcoded 0 for clarity

Signed-off-by: Nikolay Martynov <mar.kolya@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c
index 476b106..d4f23d4 100644
--- a/net/mac80211/agg-rx.c
+++ b/net/mac80211/agg-rx.c
@@ -85,7 +85,7 @@
 	/* check if this is a self generated aggregation halt */
 	if (initiator == WLAN_BACK_RECIPIENT && tx)
 		ieee80211_send_delba(sta->sdata, sta->sta.addr,
-				     tid, 0, reason);
+				     tid, WLAN_BACK_RECIPIENT, reason);
 
 	del_timer_sync(&tid_rx->session_timer);
 	del_timer_sync(&tid_rx->reorder_timer);