Ignore requests to send null/void packets. JM-1311

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/branches/openfire_3_5_0@10131 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/http/HttpSession.java

@@ -610,6 +610,10 @@ public class HttpSession extends LocalClientSession {
     }
 
     private synchronized void deliver(String text) {
+        if (text == null) {
+            // Do nothing if someone asked to send nothing :)
+            return;
+        }
         deliver(new Deliverable(text));
     }
 
@@ -698,6 +702,10 @@ public class HttpSession extends LocalClientSession {
     }
 
     private void failDelivery(Collection<Packet> packets) {
+        if (packets == null) {
+            // Do nothing if someone asked to deliver nothing :)
+            return;
+        }
         for (Packet packet : packets) {
             try {
                 backupDeliverer.deliver(packet);