build: fix compile error

Fix compile errors was introduced after installing a new XCode
component

Change-Id: Ib8b4f574348f26016fd5ffbda7154a9ebd83d427
Reviewed-by: Andreas Traczyk <andreas.traczyk@savoirfairelinux.com>

Ring/Ring/Features/Conversations/Conversation/ConversationViewModel.swift

@@ -259,9 +259,11 @@ class ConversationViewModel: ViewModel {
 
     fileprivate var unreadMessagesCount: Int {
         let accountHelper = AccountModelHelper(withAccount: self.accountService.currentAccount!)
-        return self.conversation.messages.filter({ message in
+        let unreadMessages =  self.conversation.messages
+            .filter({ message in
             return message.status != .read && message.author != accountHelper.ringId!
-        }).count
+        })
+        return unreadMessages.count
     }
 
     func sendContactRequest() {

Ring/Ring/TabBar/ChatTabBarItemViewModel.swift

@@ -32,15 +32,16 @@ class ChatTabBarItemViewModel: ViewModel, TabBarItemViewModel {
         self.itemBadgeValue = {
             return conversationService.conversations.map({ conversations in
                 return conversations.map({ conversation in
-                    return conversation.messages.filter({ message in
+                    let unreadMsg = conversation.messages.filter({ message in
                         if let account = accountService.currentAccount {
                             let accountHelper = AccountModelHelper(withAccount: account)
                             //filtre out read messages, outgoing messages and messages that are displayed in contactrequest conversation
                             return message.status != .read && message.author != accountHelper.ringId
-                            && (contactsService.contactRequest(withRingId: message.author) == nil)
+                                && (contactsService.contactRequest(withRingId: message.author) == nil)
                         }
                         return false
-                    }).count
+                    })
+                    return unreadMsg.count
                 }).reduce(0, +)
             })
             }()