From a4eccf0397f36e14ca39850e0fcafe9990695b01 Mon Sep 17 00:00:00 2001
From: ouv <ouv@opencascade.com>
Date: Thu, 12 Mar 2009 12:28:25 +0000
Subject: [PATCH] Minor change

---
 src/GLViewer/GLViewer_Viewer2d.cxx | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/GLViewer/GLViewer_Viewer2d.cxx b/src/GLViewer/GLViewer_Viewer2d.cxx
index 712bebbbf..d9b2bbec3 100644
--- a/src/GLViewer/GLViewer_Viewer2d.cxx
+++ b/src/GLViewer/GLViewer_Viewer2d.cxx
@@ -231,7 +231,8 @@ void GLViewer_Viewer2d::activateDrawers( QList<GLViewer_Object*>& theObjects, bo
     QList<GLViewer_Drawer*>::Iterator anIt = myDrawers.begin();
     QList<GLViewer_Drawer*>::Iterator endDIt = myDrawers.end();
     for( ; anIt != endDIt; anIt++ )
-        (*anIt)->clear();
+        if( *anIt )
+            (*anIt)->clear();
 
     QList<GLViewer_Drawer*> anActiveDrawers;
     QList<GLViewer_Object*>::Iterator endOIt = theObjects.end();
@@ -245,7 +246,7 @@ void GLViewer_Viewer2d::activateDrawers( QList<GLViewer_Object*>& theObjects, bo
             endDIt = myDrawers.end();
 
             for( ; anIt != endDIt; anIt++ )
-                if( (*anIt)->getObjectType() == (*oit)->getObjectType() )
+                if( *anIt && (*anIt)->getObjectType() == (*oit)->getObjectType() )
                 {
                     (*oit)->setDrawer( *anIt );
                     aDrawer = *anIt;
-- 
2.39.2