lastLocation in LocationTracker is never assigned

[agilob]

But is checked for null value, it always has null value so there is unknown bug in locationtracker

        @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
        @Override
        public void onLocationChanged(Location loc) {
            if (lastLocation != null &&
                    lastLocation.getLongitude() == loc.getLongitude() &&
                    lastLocation.getLatitude() == loc.getLatitude()) {
                // same location as before, so ignore
                return;
            }

            lastLocationTime = System.currentTimeMillis();
            extLocationListener.onLocationChanged(loc);
        }

[smarek]

Thanks for finding this, PR is available #641