We can't allow the primary ctor to be called for EntryUpdated/RemovedEvent

because that will overwrite the hackery we do with _oldEntry. Oh hackery, how
we love you so.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@6586 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/main/java/com/threerings/presents/dobj/EntryRemovedEvent.java

@@ -48,7 +48,14 @@ public class EntryRemovedEvent<T extends DSet.Entry> extends EntryEvent<T>
     {
         super(targetOid, name);
         _key = key;
-        _oldEntry = oldEntry;
+    }
+
+    /** For unserialization. */
+    public EntryRemovedEvent ()
+    {
+        super(0, null);
+        // we can't allow our primary ctor to be called during unserialization, or it will wipe out
+        // the hackery we do with _oldEntry
     }
 
     @Override

src/main/java/com/threerings/presents/dobj/EntryUpdatedEvent.java

@@ -52,6 +52,14 @@ public class EntryUpdatedEvent<T extends DSet.Entry> extends EntryEvent<T>
         _oldEntry = oldEntry;
     }
 
+    /** For unserialization. */
+    public EntryUpdatedEvent ()
+    {
+        super(0, null);
+        // we can't allow our primary ctor to be called during unserialization, or it will wipe out
+        // the hackery we do with _oldEntry
+    }
+
     @Override
     public Comparable<?> getKey ()
     {