getStudy() method. Verification of root object on NULL added

diff --git a/src/LightApp/LightApp_DataModel.cxx b/src/LightApp/LightApp_DataModel.cxx
index 5074d475fc054a8495ee7a40217ddfadef506dac..cccf466c94117a2734c0a567137f69428433a255 100644 (file)
--- a/src/LightApp/LightApp_DataModel.cxx
+++ b/src/LightApp/LightApp_DataModel.cxx
@@ -152,6 +152,8 @@ LightApp_Module* LightApp_DataModel::getModule() const
 */
 LightApp_Study* LightApp_DataModel::getStudy() const
 {
+  if ( !root() )
+    return 0;
   LightApp_RootObject* aRoot = dynamic_cast<LightApp_RootObject*>( root()->root() );
   if ( !aRoot )
     return 0;