changed inheritance to public virtual

git-svn-id: https://svn.dealii.org/trunk@7668 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/lac/include/lac/sparse_matrix.h b/deal.II/lac/include/lac/sparse_matrix.h
index b35345df640b41d83f21f92345915c01b4a69f74..2bdf3e96f150ca2190bdc896983e5fafe657b714 100644 (file)
--- a/deal.II/lac/include/lac/sparse_matrix.h
+++ b/deal.II/lac/include/lac/sparse_matrix.h
@@ -41,7 +41,7 @@ template<typename number> class FullMatrix;
  * @author several, 1994-2003
  */
 template <typename number>
-class SparseMatrix : public Subscriptor
+class SparseMatrix : public virtual Subscriptor
 {
   public:
                                     /**