Fixed ugly null pointer dereference

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@4209 383ad7c9-94d9-4d36-a494-682f7c89f535

Core/PluginCommunication.cc

@@ -85,6 +85,7 @@ void Core::slotObjectUpdated(int _identifier) {
   // just inform the plugins as we dont do anything else
   emit signalObjectUpdated(_identifier);
 
+  if ( object != 0 )
     object->update();
 
   // Reenable redraws