An UNLOAD event is not dispatched on any LoaderInfo for which INIT

has not already been dispatched. This is a pain in my ass.
Make MediaContainer dispatch UNLOAD when it unloads its business,
regardless of whether things have been initialized.


git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@458 ed5b42cb-e716-0410-a449-f6a68f950b19

src/as/com/threerings/flash/MediaContainer.as

@@ -76,6 +76,13 @@ import com.threerings.util.Util;
  */
 [Event(name="init", type="flash.events.Event")]
 
+/**
+ * Dispatched when we've unloaded our content... always. The LoaderInfo's UNLOAD event
+ * is only dispatched if the INIT event has already been dispatched and not if you cancel a
+ * load before it INIT.
+ */
+[Event(name="unload", type="flash.events.Event")]
+
 /**
  * A wrapper class for all media that will be placed on the screen.
  * Subject to change.
@@ -299,6 +306,7 @@ public class MediaContainer extends Sprite
                     // ignore
                 }
                 loader.unload();
+                dispatchEvent(new Event(Event.UNLOAD));
 
                 removeChild(loader);
                 var extra :String  = (url == _url) ? "" : (", _url=" + _url);