Update PSTCollectionViewCell.m
Update PSTCollectionViewCell.m

Avoiding highlight subviews if the view can't be highlight
Kevin775263419/PSTCollectionView,steipete/PSTCollectionView,godLoveLucifer/PSTCollectionView,jianwoo/PSTCollectionView,Anish-kumar-dev/PSTCollectionView,zjh171/PSTCollectionView,niuxinghua/PSTCollectionView,ba01ei/PSTImprovedCollectionView,zace-yuan/PSTCollectionView,CorzFree/PSTCollectionView