added the fast path.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@14016 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/View.java

@@ -111,6 +111,7 @@ public abstract class View extends AbstractModelObject implements AccessControll
      * Renames this view.
      */
     public void rename(String newName) throws ParseException {
+        if(name.equals(newName))    return; // noop
         Hudson.checkGoodName(newName);
         String oldName = name;
         name = newName;