fix collectionViewHeight bug#2

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wikimo wants to merge 2 commits intojsfu:masterfrom

Commits on Mar 5, 2015

[wikimo] fix if collectionView numberOfItemsInSection > 10 or numberOfItemsInSection / 2 != 0
wikimo
committed
[wikimo] fix if collectionView numberOfItemsInSection > 10 or numberOfItemsInSection / 2 != 0
wikimo
committed