/*
$Log$
+Revision 1.17.6.1 2002/06/10 14:43:06 hristov
+Merged with v3-08-02
+
+Revision 1.18 2002/05/24 13:29:58 hristov
+AliTrackReference added, AliDisplay modified
+
Revision 1.17 2001/10/21 18:38:44 hristov
Several pointers were set to zero in the default constructors to avoid memory management problems