OF-606: AlternateJID should be optional, not required, when destroying a room....

OF-606: AlternateJID should be optional, not required, when destroying a room. I've added some Javadoc that explains what arguments are, and what arguments are not optional.

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@13424 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/muc/cluster/DestroyRoomRequest.java

@@ -36,8 +36,8 @@ import org.xmpp.packet.JID;
  * @author Gaston Dombiak
  */
 public class DestroyRoomRequest extends MUCRoomTask {
-    private JID alternateJID;
-    private String reason;
+    private JID alternateJID; // Is allowed to be null!
+    private String reason; // Is allowed to be null or empty!
 
     public DestroyRoomRequest() {
     }

src/java/org/jivesoftware/openfire/muc/spi/IQOwnerHandler.java

@@ -122,8 +122,12 @@ public class IQOwnerHandler {
                     }
                 }
 
-				room.destroyRoom(new JID(destroyElement.attributeValue("jid")),
-						destroyElement.elementTextTrim("reason"));
+                JID alternateJID = null;
+                final String jid = destroyElement.attributeValue("jid");
+                if (jid != null) {
+                    alternateJID = new JID(jid);
+                }
+                room.destroyRoom(alternateJID, destroyElement.elementTextTrim("reason"));
             }
             else {
                 List<Element> itemsList = element.elements("item");