Preserve the stack trace when CloneNotSupportedException impossibly happens.

git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@21 c613c5cb-e716-0410-b11b-feb51c14d237

src/java/com/threerings/puzzle/data/Board.java

@@ -55,7 +55,7 @@ public abstract class Board
             board._rando = (BoardRandom)_rando.clone();
             return board;
         } catch (CloneNotSupportedException cnse) {
-            throw new RuntimeException("All is wrong with universe.");
+            throw new RuntimeException(cnse);
         }
     }
 
@@ -175,7 +175,7 @@ public abstract class Board
             try {
                 return super.clone();
             } catch (CloneNotSupportedException cnse) {
-                throw new RuntimeException("All is wrong with universe.");
+                throw new RuntimeException(cnse);
             }
         }