Plane: update for APM_OBC API change

ArduPlane/ArduPlane.pde

@@ -975,7 +975,7 @@ static void obc_fs_check(void)
 {
 #if OBC_FAILSAFE == ENABLED
     // perform OBC failsafe checks
-    obc.check(OBC_MODE(control_mode), failsafe.last_heartbeat_ms);
+    obc.check(OBC_MODE(control_mode), failsafe.last_heartbeat_ms, geofence_breached());
 #endif
 }
 

ArduPlane/geofence.pde

@@ -424,8 +424,10 @@ static void geofence_send_status(mavlink_channel_t chan)
     }
 }
 
-// public function for use in failsafe modules
-bool geofence_breached(void)
+/*
+  return true if geofence has been breached
+ */
+static bool geofence_breached(void)
 {
     return geofence_state ? geofence_state->fence_triggered : false;
 }