fix

Plugin/Levelset.cpp

-// $Id: Levelset.cpp,v 1.35 2007-09-11 15:29:01 geuzaine Exp $
+// $Id: Levelset.cpp,v 1.36 2007-09-15 16:20:49 geuzaine Exp $
 //
 // Copyright (C) 1997-2007 C. Geuzaine, J.-F. Remacle
 //
@@ -555,7 +555,7 @@ PView *GMSH_LevelsetPlugin::execute(PView *v)
   if(_valueView < 0) {
     w = v;
   }
-  else if(_valueView < 0 || _valueView > PView::list.size() - 1){
+  else if(_valueView > PView::list.size() - 1){
     Msg(GERROR, "View[%d] does not exist: reverting to View[%d]", 
 	_valueView, v->getIndex());
     w = v;

Plugin/StreamLines.cpp

-// $Id: StreamLines.cpp,v 1.31 2007-09-11 14:01:55 geuzaine Exp $
+// $Id: StreamLines.cpp,v 1.32 2007-09-15 16:20:49 geuzaine Exp $
 //
 // Copyright (C) 1997-2007 C. Geuzaine, J.-F. Remacle
 //
@@ -372,7 +372,7 @@ PView *GMSH_StreamLinesPlugin::execute(PView *v)
   PView *v1 = getView(iView, v);
   if(!v1) return v;
 
-  PView *v2 = getView(dView, v);
+  PView *v2 = (dView < 0) ? 0 : getView(dView, v);
 
   return GenerateView(v1, v2);
 }