Proguard fucks up if we use clone(). There's no apparent way to find out why it

magically booches and causes an IncompatibleClassChangeError, so we're just
going to work around it.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4008 542714f4-19e9-0310-aa3c-eee0fc999fb1

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

@@ -377,7 +377,8 @@ public class DSet
     {
         try {
             DSet nset = (DSet)super.clone();
-            nset._entries = (Entry[])_entries.clone();
+            nset._entries = new Entry[_entries.length];
+            System.arraycopy(_entries, 0, nset._entries, 0, _entries.length);
             nset._modCount = 0;
             return nset;
         } catch (CloneNotSupportedException cnse) {