bug fix isset waypoint on map monitoring

app/Http/Controllers/MapMonitoringController.php

@@ -54,8 +54,8 @@ class MapMonitoringController extends Controller
                 $waypoint = DB::table('m_waypoint')->select('lat', 'lon', 'wptime')->where('user_id', $presensi->user_id)->orderBy('wptime', 'DESC')->first();
                 $tmp[] = array(
                     'user_id' => $presensi->user_id,
-                    'wp_lat' => isset($waypoint) ? $waypoint->lat : '-',
-                    'wp_lon' => isset($waypoint) ? $waypoint->lon : '-',
+                    'wp_lat' => isset($waypoint) ? $waypoint->lat : null,
+                    'wp_lon' => isset($waypoint) ? $waypoint->lon : null,
                     'wp_time' => isset($waypoint) ? $waypoint->wptime : '-',
                     'clock_in' => $presensi->clock_in,
                     'clock_out' => $presensi->clock_out,