Crank the CharacterManager cache up too so we're not compositing our sea monsters over and over again.

git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@293 ed5b42cb-e716-0410-a449-f6a68f950b19

src/java/com/threerings/cast/CharacterManager.java

@@ -451,5 +451,5 @@ public class CharacterManager
         new RuntimeAdjust.IntAdjust(
             "Size (in kb of memory used) of the character manager LRU " +
             "action cache [requires restart]", "narya.cast.action_cache_size",
-            CastPrefs.config, 1024);
+            CastPrefs.config, 32768);
 }