mavlink_receiver: Reject own autopilot messages for battery status.

Signed-off-by: Claudio Micheli <claudio@auterion.com>

src/modules/mavlink/mavlink_receiver.cpp

@@ -1597,8 +1597,8 @@ MavlinkReceiver::handle_message_ping(mavlink_message_t *msg)
 void
 MavlinkReceiver::handle_message_battery_status(mavlink_message_t *msg)
 {
-	if (msg->sysid != mavlink_system.sysid) {
-		// ignore battery status of other system
+	if ((msg->sysid != mavlink_system.sysid) || (msg->compid == mavlink_system.compid)) {
+		// ignore battery status coming from other systems or from the autopilot itself
 		return;
 	}