fixed bug where the mapDragStart could be null
fixed bug where the mapDragStart could be null

georgegtx/emp3-web,georgegtx/emp3-web,missioncommand/emp3-web,missioncommand/emp3-web,missioncommand/emp3-web,georgegtx/emp3-web,missioncommand/emp3-web,georgegtx/emp3-web