Implemented #canBroadcastPresence.

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@457 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/messenger/muc/spi/MUCPersistentRoomSurrogate.java

@@ -487,7 +487,7 @@ class MUCPersistentRoomSurrogate implements MUCRoom, Cacheable {
     }
 
     public boolean canBroadcastPresence(String roleToBroadcast) {
-        throw new UnsupportedOperationException();
+        return "none".equals(roleToBroadcast) || rolesToBroadcastPresence.contains(roleToBroadcast);
     }
 
     public void unlockRoom(MUCRole senderRole) {