bouncy-flight.js: Fix missing function altitudeReached

bouncy-flight.js

 /*jslint nomen: true, indent: 2, maxerr: 3, maxlen: 80 */
 /*global console, me*/
 
-   (function (console, me) {
+(function (console, me) {
   "use strict";
 
   var EPSILON = 9,
@@ -90,6 +90,13 @@
       }
     ];
 
+  function altitudeReached(altitude, target_altitude) {
+    console.log(
+        `[DEMO] Waiting for altitude... (${altitude} , ${target_altitude})`
+      );
+      return Math.abs(altitude - target_altitude) < EPSILON_ALTITUDE;
+    }
+
   function distance(lat1, lon1, lat2, lon2) {
     var R = 6371e3, // meters
       la1 = lat1 * Math.PI / 180, // la, lo in radians
@@ -197,5 +204,4 @@
       me.exit(0);
     }
   };
-   }(console, me));
-   
\ No newline at end of file
+}(console, me));