Fix crash when poll voting fails

Tusker/Views/Poll/StatusPollView.swift

@@ -21,6 +21,7 @@ class StatusPollView: UIView {
     }()
     
     weak var mastodonController: MastodonController!
+    weak var toastableViewController: ToastableViewController?
     
     private var statusID: String!
     private(set) var poll: Poll?
@@ -151,7 +152,14 @@ class StatusPollView: UIView {
         mastodonController.run(request) { (response) in
             switch response {
             case let .failure(error):
-                fatalError("error voting in poll: \(error)")
+                DispatchQueue.main.async {
+                    self.updateUI(status: self.mastodonController.persistentContainer.status(for: self.statusID)!, poll: self.poll)
+                    
+                    if let toastable = self.toastableViewController {
+                        let config = ToastConfiguration(from: error, with: "Error Voting", in: toastable, retryAction: nil)
+                        toastable.showToast(configuration: config, animated: true)
+                    }
+                }
                 
             case let .success(poll, _):
                 let container = self.mastodonController.persistentContainer

Tusker/Views/Status/BaseStatusTableViewCell.swift

@@ -211,6 +211,7 @@ class BaseStatusTableViewCell: UITableViewCell {
         
         pollView.isHidden = status.poll == nil
         pollView.mastodonController = mastodonController
+        pollView.toastableViewController = delegate?.toastableViewController
         pollView.updateUI(status: status, poll: status.poll)
     }