Re-dispatch the UNLOAD event through the gameControl.

git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@480 c613c5cb-e716-0410-b11b-feb51c14d237

src/as/com/threerings/ezgame/EZGameControl.as

@@ -95,6 +95,14 @@ import flash.geom.Point;
  */
 [Event(name="GameEnded", type="com.threerings.ezgame.StateChangedEvent")]
 
+/**
+ * Dispatched when the game client is unloaded and you should clean up any Timers or
+ * other bits left hanging.
+ *
+ * @eventType flash.events.Event.UNLOAD
+ */
+[Event(name="unload", type="flash.events.Event")]
+
 /**
  * Dispatched when a property has changed in the shared game state.
  *
@@ -144,6 +152,9 @@ public class EZGameControl extends BaseControl
         // set up our focusing click handler
         disp.root.addEventListener(MouseEvent.CLICK, handleRootClick);
 
+        // set up the unload event to propogate
+        disp.root.loaderInfo.addEventListener(Event.UNLOAD, dispatch);
+
         // TODO: this should only be available if the game uses it
         _seating = new SeatingControl(this);
     }