changed GPS listener

lib/pages/destination_map/destination_map_page.dart

@@ -42,7 +42,7 @@ class DestinationMapPage extends StatelessWidget {
       //print("^^^^ $d ^^^^");
       Marker m = Marker(
           point: LatLng(d.lat!, d.lon!),
-          alignment: Alignment.topCenter,
+          alignment: Alignment.center,
           child: InkWell(
             onTap: () {
               //print("-- Destination is --- ${d.name} ------");