Merge pull request #2 from rtyley/si-8019-swing-publisher-check-pf-defined

SI-8019 Make Publisher check PartialFunction is defined for Event

Author: adriaanm

src/main/scala/scala/swing/Publisher.scala

@@ -44,7 +44,7 @@ trait Publisher extends Reactor {
   /**
    * Notify all registered reactions.
    */
-  def publish(e: Event) { for (l <- listeners) l(e) }
+  def publish(e: Event) { for (l <- listeners) if (l.isDefinedAt(e)) l(e) }
 
   listenTo(this)
 }