[ORKDirectionView] Avoid CGMutablePath leak
[ORKDirectionView] Avoid CGMutablePath leak

boland25/ResearchKit,boland25/ResearchKit,cornelltech/ResearchKit,mluedke2/ResearchKit,oliverschaefer/ResearchKit,oliverschaefer/ResearchKit,md0u80c9/ResearchKit,jeremiahyan/ResearchKit,mluedke2/ResearchKit,chb/ResearchKit,md0u80c9/ResearchKit,cornelltech/ResearchKit,weijentu/ResearchKit,jeremiahyan/ResearchKit,cornelltech/ResearchKit,weijentu/ResearchKit,md0u80c9/ResearchKit,boland25/ResearchKit,md0u80c9/ResearchKit,YuanZhu-apple/ResearchKit,jeremiahyan/ResearchKit,chb/ResearchKit,YuanZhu-apple/ResearchKit,oliverschaefer/ResearchKit,weijentu/ResearchKit,boland25/ResearchKit,mluedke2/ResearchKit,YuanZhu-apple/ResearchKit,weijentu/ResearchKit,YuanZhu-apple/ResearchKit,chb/ResearchKit,oliverschaefer/ResearchKit,chb/ResearchKit