1 files changed, 11 insertions, 2 deletions

diff --git a/libkcal/incidencebase.cpp b/libkcal/incidencebase.cpp
index 9aa517c..7525a4a 100644
--- a/libkcal/incidencebase.cpp
+++ b/libkcal/incidencebase.cpp
@@ -213,14 +213,23 @@ void IncidenceBase::setFloats(bool f)
 }
 
 
-void IncidenceBase::addAttendee(Attendee *a, bool doupdate)
+bool IncidenceBase::addAttendee(Attendee *a, bool doupdate)
 {
-  if (mReadOnly) return;
+  if (mReadOnly) return false;
   if (a->name().left(7).upper() == "MAILTO:")
     a->setName(a->name().remove(0,7));
 
+  QPtrListIterator<Attendee> qli(mAttendees);
+  
+  qli.toFirst();
+  while (qli) {
+      if (*qli.current() == *a)
+          return false;
+      ++qli;
+  }
   mAttendees.append(a);
   if (doupdate) updated();
+  return true;
 }
 
 #if 0