remove original polyline when in nyan mode

Author: rossengeorgiev

cache.manifest

@@ -1,5 +1,5 @@
 CACHE MANIFEST
-# version 138
+# version 139
 
 # gogole maps files
 http://maps.google.com/maps/api/js?v=3.10&sensor=false&key=AIzaSyCOqkcNey4CCyG4X0X5qxHAhCgD8g5DwXg

js/tracker.js

@@ -765,6 +765,7 @@ function addPosition(position) {
             vehicle_info.image_src = host_url + markers_url + "hab_nyan.gif";
 
             var rainbow = ["#ff0000", "#fc9a00", "#f6ff00", "#38ff01", "#009aff","#0000ff"];
+            vehicle_info.polyline = [];
 
             for(k in rainbow) {
                 vehicle_info.polyline.push(new google.maps.Polyline({