Copter: make superclass handle command_ack packets

ArduCopter/GCS_Mavlink.cpp

@@ -708,6 +708,12 @@ void GCS_MAVLINK_Copter::send_banner()
 }
 
 
+void GCS_MAVLINK_Copter::handle_command_ack(const mavlink_message_t* msg)
+{
+    copter.command_ack_counter++;
+    GCS_MAVLINK::handle_command_ack(msg);
+}
+
 void GCS_MAVLINK_Copter::handleMessage(mavlink_message_t* msg)
 {
     MAV_RESULT result = MAV_RESULT_FAILED;         // assume failure.  Each messages id is responsible for return ACK or NAK if required
@@ -1337,12 +1343,6 @@ void GCS_MAVLINK_Copter::handleMessage(mavlink_message_t* msg)
         break;
     }
 
-    case MAVLINK_MSG_ID_COMMAND_ACK:        // MAV ID: 77
-    {
-        copter.command_ack_counter++;
-        break;
-    }
-
 #if MODE_GUIDED_ENABLED == ENABLED
     case MAVLINK_MSG_ID_SET_ATTITUDE_TARGET:   // MAV ID: 82
     {

ArduCopter/GCS_Mavlink.h

@@ -39,6 +39,7 @@ protected:
 private:
 
     void handleMessage(mavlink_message_t * msg) override;
+    void handle_command_ack(const mavlink_message_t* msg) override;
     bool handle_guided_request(AP_Mission::Mission_Command &cmd) override;
     void handle_change_alt_request(AP_Mission::Mission_Command &cmd) override;
     bool try_send_message(enum ap_message id) override;