wifi: mac80211_hwsim: check STA magic in change_sta_links

Just as an additional check that mac80211 isn't doing
anything strange, add a check of the STA magic (which
gets assigned when the station is added, and cleared
when the station is removed).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/mac80211_hwsim.c

@@ -3021,6 +3021,8 @@ static int mac80211_hwsim_change_sta_links(struct ieee80211_hw *hw,
 					   struct ieee80211_sta *sta,
 					   u16 old_links, u16 new_links)
 {
+	hwsim_check_sta_magic(sta);
+
 	return 0;
 }