mac80211: use bool argument to ieee80211_send_nullfunc

Instead of int with 0/1, use bool with false/true for the
powersave argument to ieee80211_send_nullfunc().

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 62948bb..60c4dbf 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1966,7 +1966,7 @@
 			if (!sdata->u.mgd.associated)
 				continue;
 
-			ieee80211_send_nullfunc(local, sdata, 0);
+			ieee80211_send_nullfunc(local, sdata, false);
 		}
 	}