Merge pull request #72 from riccoyu/fix_swift5.7_if_let

Fix compiling errors caused by if let shorthand, when compiling with …

Sources/RSCore/CloudKit/CloudKitZone.swift

@@ -764,10 +764,10 @@ public extension CloudKitZone {
  guard incremental else { return }
 
  wasChanged(updated: updatedRecords, deleted: deletedRecordKeys, token: token) { error in
- if let error {
- op.cancel()
- completion(.failure(error))
- }
+ if let error = error {
+ op.cancel()
+ completion(.failure(error))
+ }
  }
  updatedRecords = [CKRecord]()
  deletedRecordKeys = [CloudKitRecordKey]()
@@ -785,10 +785,10 @@ public extension CloudKitZone {
  op.recordZoneFetchCompletionBlock = { zoneID ,token, _, finalChange, error in
  if case .success = CloudKitZoneResult.resolve(error) {
  wasChanged(updated: updatedRecords, deleted: deletedRecordKeys, token: token) { error in
- if let error {
- op.cancel()
- completion(.failure(error))
- }
+ if let error = error {
+ op.cancel()
+ completion(.failure(error))
+ }
  }
  }
  updatedRecords = [CKRecord]()