station: Fix not cleaning up pending_connect

If the disconnect fails and station_disconnect_onconnect_cb is called
with an error, we reply to the original message accordingly.
Unfortunately pending_connect is not unrefed or cleared in this case.
Fix that.

Fixes: d0ee923dda ("station: Disconnect, if needed, on a new connection attempt")

src/station.c

@@ -2488,8 +2488,8 @@ static void station_disconnect_onconnect_cb(struct netdev *netdev, bool success,
 	station->connect_pending_bss = NULL;
 
 	if (err < 0) {
-		l_dbus_send(dbus_get_bus(),
-				dbus_error_from_errno(err,
+		dbus_pending_reply(&station->connect_pending,
+					dbus_error_from_errno(err,
 						station->connect_pending));
 		return;
 	}