Amended synchronized mistake made in r1380169.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1380514 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/events/CompositeEventListener.java

@@ -51,7 +51,7 @@ public class CompositeEventListener implements EventListener {
      * Indicates whether any listeners have been registered with the broadcaster.
      * @return true if listeners are present, false otherwise
      */
-    public boolean hasEventListeners() {
+    public synchronized boolean hasEventListeners() {
         return !listeners.isEmpty();
     }