Fixes an issue where sending article statuses to Feedly was finishing prematurely.

Frameworks/Account/Feedly/Operations/FeedlyOperation.swift

@@ -20,12 +20,14 @@ class FeedlyOperation: Operation {
 	
 	func didFinish() {
 		assert(Thread.isMainThread)
+		assert(!isFinished, "Finished operation is attempting to finish again.")
 		self.isExecutingOperation = false
 		self.isFinishedOperation = true
 	}
 	
 	func didFinish(_ error: Error) {
 		assert(Thread.isMainThread)
+		assert(!isFinished, "Finished operation is attempting to finish again.")
 		delegate?.feedlyOperation(self, didFailWith: error)
 		didFinish()
 	}

Frameworks/Account/Feedly/Operations/FeedlySendArticleStatusesOperation.swift

@@ -24,9 +24,8 @@ final class FeedlySendArticleStatusesOperation: FeedlyOperation {
 	}
 	
 	override func main() {
-		defer { didFinish() }
-		
 		guard !isCancelled else {
+			didFinish()
 			return
 		}
 		

Frameworks/Account/Feedly/Operations/FeedlySetStarredArticlesOperation.swift

@@ -27,9 +27,8 @@ final class FeedlySetStarredArticlesOperation: FeedlyOperation {
 	}
 	
 	override func main() {
-		defer { didFinish() }
-		
 		guard !isCancelled else {
+			didFinish()
 			return
 		}
 		

Frameworks/Account/Feedly/Operations/FeedlySyncAllOperation.swift

@@ -102,6 +102,7 @@ final class FeedlySyncAllOperation: FeedlyOperation {
 	
 	override func main() {
 		guard !isCancelled else {
+			// override of cancel calls didFinish().
 			return
 		}