Fix audit provider example

examples/providers/audit-provider-mem/src/main/java/org/keycloak/examples/providers/audit/MemEventQuery.java

@@ -27,13 +27,17 @@ public class MemEventQuery implements EventQuery {
         Iterator<Event> itr = this.events.iterator();
         while (itr.hasNext()) {
             Event next = itr.next();
+            boolean include = false;
             for (EventType e : events) {
                 if (next.getEvent().equals(e)) {
+                    include = true;
                     break;
                 }
             }
+            if (!include) {
                 itr.remove();
             }
+        }
         return this;
     }