fix reload

Fltk/Callbacks.cpp

-// $Id: Callbacks.cpp,v 1.544 2007-09-11 14:01:54 geuzaine Exp $
+// $Id: Callbacks.cpp,v 1.545 2007-09-12 06:00:59 geuzaine Exp $
 //
 // Copyright (C) 1997-2007 C. Geuzaine, J.-F. Remacle
 //
@@ -4210,20 +4210,24 @@ static void _view_reload(int index)
       return;
     }
 
+    int n = PView::list.size();
+
     // FIXME: use fileIndex
     MergeFile((char*)p->getData()->getFileName().c_str());
 
+    if(PView::list.size() > n){ // we loaded a new view
       // delete old data and replace with new
       delete p->getData();
       p->setData(PView::list.back()->getData());
       PView::list.back()->setData(0);
-
       // delete new view
       delete PView::list.back();
-
       // in case the reloaded view has a different number of time steps
       if(p->getOptions()->TimeStep > p->getData()->getNumTimeSteps() - 1)
 	p->getOptions()->TimeStep = 0;
+      p->setChanged(true);
+      WID->update_views();
+    }
   }
 }