Share a single MethodFinder between all instances of a subclass of PlaceManager as they can be large enough constitute the bulk of a PlaceManager

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5029 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/dobj/DynamicListener.java

@@ -42,9 +42,18 @@ public class DynamicListener
      * target.
      */
     public DynamicListener (Object target)
+    {
+        this(target, new MethodFinder(target.getClass()));
+    }
+    
+    /**
+     * Creates a listener that dynamically dispatches events on the supplied
+     * target using the methods in finder.
+     */
+    public DynamicListener (Object target, MethodFinder finder)
     {
         _target = target;
-        _finder = new MethodFinder(target.getClass());
+        _finder = finder;
     }
 
     // from interface AttributeChangeListener