--- base/SignalSender.cpp.old	2011-04-26 09:39:24.303339444 +0200
+++ base/SignalSender.cpp	2011-04-26 09:39:51.261063162 +0200
@@ -11,6 +11,7 @@
 #include "SignalSender.h"
 #include "Group.h"
 #include "Behavior.h"
+#include <cstddef>
 
 SignalSender * SignalSender::p_SignalSender = NULL;
 
--- base/Behavior.cpp.old	2011-04-26 09:36:27.129006665 +0200
+++ base/Behavior.cpp	2011-04-26 09:36:48.855396752 +0200
@@ -9,6 +9,7 @@
 #include "Private.h"
 #include "Behavior.h"
 #include "Group.h"
+#include <cstddef>
 
 Behavior::Behavior() {
 	//EM_COUT("Behavior::Behavior", 1);
--- base/BehaviorVisitor.cpp.old	2011-04-26 09:37:39.759653248 +0200
+++ base/BehaviorVisitor.cpp	2011-04-26 09:37:54.481594952 +0200
@@ -9,6 +9,7 @@
 #include "BehaviorVisitor.h"
 #include "Behavior.h"
 #include "Group.h"
+#include <cstddef>
 
 BehaviorVisitor * BehaviorVisitor::p_BehaviorVisitor = NULL;