#refactoring in MMCoverFlowLayout
#refactoring in MMCoverFlowLayout

- fixed code smell redundant local variable in - originForItem:

mmllr/MMFlowView,mmllr/MMFlowView,alvinvarghese/MMFlowView,mmllr/MMFlowView,alvinvarghese/MMFlowView,alvinvarghese/MMFlowView,alvinvarghese/MMFlowView,alvinvarghese/MMFlowView