Fix typo in setting backgroundView.autoresizingMask
Fix typo in setting backgroundView.autoresizingMask

steipete/PSTCollectionView,zace-yuan/PSTCollectionView,niuxinghua/PSTCollectionView,zjh171/PSTCollectionView,Amnysia/PSTCollectionView,jianwoo/PSTCollectionView,StephaneDelcroix/PSTCollectionView,Kevin775263419/PSTCollectionView,godLoveLucifer/PSTCollectionView,ba01ei/PSTImprovedCollectionView,CorzFree/PSTCollectionView,StephaneDelcroix/PSTCollectionView,Anish-kumar-dev/PSTCollectionView