tweak closing engine

Author: nuclearace

README.md

@@ -109,7 +109,7 @@ Methods
 5. `emitWithAck(event:String, _ items:AnyObject...) -> (timeout:UInt64, callback:(NSArray?) -> Void) -> Void` - Sends a message that requests an acknowledgement from the server. Returns a function which you can use to add a handler. See example. Note: The message is not sent until you call the returned function.
 6. `emitWithAck(event:String, withItems items:[AnyObject]) -> (UInt64, (NSArray?) -> Void) -> Void` - `emitWithAck` for Objective-C. Note: The message is not sent until you call the returned function.
 7. `connect()` - Establishes a connection to the server. A "connect" event is fired upon successful connection.
-8. `connect(#timeoutAfter:Int, withTimeoutHandler handler:(() -> Void)?)` - Connect to the server. If it isn't connect after timeoutAfter seconds, the handler is called.
+8. `connect(#timeoutAfter:Int, withTimeoutHandler handler:(() -> Void)?)` - Connect to the server. If it isn't connected after timeoutAfter seconds, the handler is called.
 9. `close(#fast:Bool)` - Closes the socket. Once a socket is closed it should not be reopened. Pass true to fast if you're closing from a background task.
 10. `reconnect()` - Causes the client to reconnect to the server.
 

SocketIOClientSwift/SocketEngine.swift

@@ -119,13 +119,14 @@ public final class SocketEngine: NSObject, WebSocketDelegate, SocketLogClient {
         self.pingTimer?.invalidate()
         self.closed = true
 
-        self.write("", withType: PacketType.CLOSE, withData: nil)
         self.ws?.disconnect()
-        self.stopPolling()
 
         if fast || self.polling {
+            self.write("", withType: PacketType.CLOSE, withData: nil)
             self.client?.engineDidClose("Disconnect")
         }
+        
+        self.stopPolling()
     }
 
     private func createBinaryDataForSend(data:NSData) -> (NSData?, String?) {