Fix a conditional bug: if the remote end supports pipe throttling, make

sure to use the right type of pipe window.

remoting/src/main/java/hudson/remoting/Channel.java

@@ -609,7 +609,7 @@ public class Channel implements VirtualChannel, IChannel {
             }
 
             PipeWindow w;
-            if (!remoteCapability.supportsPipeThrottling())
+            if (remoteCapability.supportsPipeThrottling())
                 w = new Real(k, PIPE_WINDOW_SIZE);
             else
                 w = new PipeWindow.Fake();