Handle CloneNotSupportedException in a standard and most-correct way.

git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@17 ed5b42cb-e716-0410-a449-f6a68f950b19

src/java/com/threerings/miso/data/MisoSceneModel.java

@@ -118,9 +118,9 @@ public abstract class MisoSceneModel extends SimpleStreamableObject
     public Object clone ()
     {
         try {
-            return (MisoSceneModel)super.clone();
+            return super.clone();
         } catch (CloneNotSupportedException cnse) {
-            throw new RuntimeException("MisoSceneModel.clone: " + cnse);
+            throw new RuntimeException(cnse);
         }
     }
 

src/java/com/threerings/miso/data/ObjectInfo.java

@@ -154,8 +154,7 @@ public class ObjectInfo extends SimpleStreamableObject
         try {
             return super.clone();
         } catch (CloneNotSupportedException cnse) {
-            // notgunnahappen.
-            return null;
+            throw new RuntimeException(cnse);
         }
     }
 

src/java/com/threerings/miso/data/SparseMisoSceneModel.java

@@ -223,8 +223,7 @@ public class SparseMisoSceneModel extends MisoSceneModel
                 section.objectInfo = (ObjectInfo[])objectInfo.clone();
                 return section;
             } catch (CloneNotSupportedException cnse) {
-                throw new RuntimeException(
-                    "SparseMisoSceneModel.Section.clone: " + cnse);
+                throw new RuntimeException(cnse);
             }
         }