Fixing logic error in JID class / cache routine (JM-1453).

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@10850 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/xmpp/packet/JID.java

@@ -578,7 +578,7 @@ public class JID implements Comparable<JID>, Externalizable {
 		public void put(K entry) {
 			synchronized (entry) {
 				// add value to the cache
-				if (cachedValues.put(entry, NULL) != null) {
+				if (cachedValues.put(entry, NULL) == null) {
 					// ensure that queue doesn't contain duplicates.
 					fifoQueue.offer(entry);
 				}