Fix memory leak.
Fix memory leak.

bigrpg/UICKeyChainStore,kishikawakatsumi/UICKeyChainStore,dleehr/UICKeyChainStore,royalwang/UICKeyChainStore,gauravds/UICKeyChainStore,kishikawakatsumi/UICKeyChainStore,hanhailong/UICKeyChainStore,Kingside/UICKeyChainStore,hulu001/UICKeyChainStore,HSFGitHub/UICKeyChainStore,TomoakiNagahara/UICKeyChainStore,Ninikitos/UICKeyChainStore,imjerrybao/UICKeyChainStore,v2dev/UICKeyChainStore,dezinezync/UICKeyChainStore