made just a little bit more efficient. Did this fix issue #1564?

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@8770 71c3de6d-444a-0410-be80-ed276b4c234a

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

@@ -742,6 +742,10 @@ public final class Hudson extends View implements ItemGroup<TopLevelItem>, Node,
         return r;
     }
 
+    /*package*/ Computer getComputer(Node n) {
+        return computers.get(n);
+    }
+
     public Computer getComputer(String name) {
         if(name.equals("(master)"))
             name = "";
@@ -762,7 +766,7 @@ public final class Hudson extends View implements ItemGroup<TopLevelItem>, Node,
     }
 
     public Computer toComputer() {
-        return getComputer("");
+        return getComputer(this);
     }
 
     /**

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

@@ -559,7 +559,7 @@ public final class Slave implements Node, Serializable {
      * Gets the corresponding computer object.
      */
     public ComputerImpl getComputer() {
-        return (ComputerImpl)Hudson.getInstance().getComputer(getNodeName());
+        return (ComputerImpl)Hudson.getInstance().getComputer(this);
     }
 
     public Computer toComputer() {