Fix error in depotIdToVehicleId function

 common.js

@@ -117,7 +117,7 @@
function depotIdToVehicleId(depotId, typeHelper) {
    if(typeHelper) {
        for(var prop in vehicles_info) {
            if(prop.substr(0,1) == type && vehicles_info[prop]['num'].substr(2) == depotId) {
            if(prop.substr(0,1) == typeHelper && vehicles_info[prop]['num'].substr(2) == depotId) {
                return prop;
            }
        }

 map.html

@@ -17,7 +17,7 @@
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList"></script>
<script src="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v5.3.0/build/ol.js" integrity="sha384-iQkGyyH4ioz3m+maM3s9MX1Oq67mACa4B9Z3ovUv3Sv37LJ96fx3WnZfLoiC3Wfl" crossorigin="anonymous"></script>
<script tyle="text/javascript" src="lang_pl.js?v3" id="lang_script"></script>
<script tyle="text/javascript" src="common.js?v5"></script>
<script tyle="text/javascript" src="common.js?v6"></script>
<script tyle="text/javascript" src="map.js?v9"></script>
</body>
</html>