[driver passenger ] bus乘客屏埋点空指针处理

OCH/mogo-och-bus/src/main/java/com/mogo/och/bus/presenter/BusOrderModel.java

@@ -826,7 +826,7 @@ public class BusOrderModel {
     }
 
     public void triggerStartServiceEvent(boolean send) {
-        if (stationList == null || currentStationIndex >= stationList.size()) {
+        if (stationList == null || currentStationIndex >= stationList.size() || currentStationIndex == 0) {
             return;
         }
         BusStationBean currentStation = stationList.get( currentStationIndex -1);