From a83a02d9250f97ac261f222cb9152d960660cfbf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=93scar=20Gonz=C3=A1lez=20Fern=C3=A1ndez?=
 <ogonzalez@igalia.com>
Date: Mon, 11 Jan 2010 23:34:50 +0100
Subject: [PATCH] ItEr43S09ImplantacionAplicacionItEr42S13: Fixing bug. Avoding
 NullPointerException.

---
 .../main/java/org/zkoss/ganttz/servlets/CallbackServlet.java   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/servlets/CallbackServlet.java b/ganttzk/src/main/java/org/zkoss/ganttz/servlets/CallbackServlet.java
index cc39edbc6..9e47c7d73 100644
--- a/ganttzk/src/main/java/org/zkoss/ganttz/servlets/CallbackServlet.java
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/servlets/CallbackServlet.java
@@ -163,7 +163,8 @@ public class CallbackServlet extends HttpServlet {
     }
 
     private IServletRequestHandler handlerFor(String callbackId) {
-        return handlersCallbacks.get(callbackId).handler;
+        HandlerWithRegisterTime h = handlersCallbacks.get(callbackId);
+        return h != null ? h.handler : null;
     }
 
 }