handle missing roster item
handle missing roster item

lqch14102/lantern,getlantern/lantern-java,lqch14102/lantern,getlantern/lantern-java,getlantern/lantern-java,getlantern/lantern-java,getlantern/lantern-java,lqch14102/lantern,getlantern/lantern-java,getlantern/lantern-java,lqch14102/lantern,getlantern/lantern-java,lqch14102/lantern,lqch14102/lantern,lqch14102/lantern,lqch14102/lantern,lqch14102/lantern,getlantern/lantern-java