CircleBaseViewHolder NullPointerException

[OsBelief]

当MomentsInfo的content为null时，会创建EmptyMomentsVH，此时会发生NullPointerException；
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void razerdp.github.com.ui.widget.common.ClickShowMoreLayout.setOnStateKeyGenerateListener(razerdp.github.com.ui.widget.common.ClickShowMoreLayout$OnStateKeyGenerateListener)' on a null object reference
at razerdp.friendcircle.ui.viewholder.CircleBaseViewHolder.(CircleBaseViewHolder.java:78)
at razerdp.friendcircle.ui.viewholder.EmptyMomentsVH.(EmptyMomentsVH.java:27)