Update PersistenceContextsImpl.java

I´m facing some problems using seam persistence(3.0.0.Final) in clustered tomcat6.
When using session replication throught DeltaManager, the following exception occurs:

org.apache.catalina.ha.session.DeltaManager requestCompleted
SEVERE: Unable to serialize delta request for sessionid [4F3785FD97924B5DD4D948B562F057E2.node2]
java.io.NotSerializableException: org.jboss.seam.persistence.PersistenceContextsImpl$PersistenceContextDefintition
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1164)

		
		
I´ve modified the inner class PersistenceContextDefintition removing static and implementing Serializable to solve my problem.

impl/src/main/java/org/jboss/seam/persistence/PersistenceContextsImpl.java

@@ -132,7 +132,9 @@ public void afterRender() {
         restoreFlushMode();
     }
 
-    public static class PersistenceContextDefintition {
+    public class PersistenceContextDefintition implements Serializable {
+
+	    private static final long serialVersionUID = 1L;
         private final Set<Annotation> qualifiers;
         private final Class<?> type;