Don't wait for queued messages if the timeout is negative. This requires a very close timing of when it thinks it should do another loop and when it actually does the loop. Fixes #14.

src/net/socialgamer/cah/data/User.java

@@ -105,8 +105,10 @@ public class User {
    * @throws InterruptedException
    */
   public void waitForNewMessageNotification(final long timeout) throws InterruptedException {
-    synchronized (queuedMessageSynchronization) {
-      queuedMessageSynchronization.wait(timeout);
+    if (timeout > 0) {
+      synchronized (queuedMessageSynchronization) {
+        queuedMessageSynchronization.wait(timeout);
+      }
     }
   }