disallow direct use of abstract class

git-svn-id: https://svn.dealii.org/trunk@15903 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/lac/include/lac/sparse_decomposition.h b/deal.II/lac/include/lac/sparse_decomposition.h
index bfd166079243d78a37ee31ee9600b3bc4a80fb40..32ec0de4161e1255763a4741417d28f3e339eb0c 100644 (file)
--- a/deal.II/lac/include/lac/sparse_decomposition.h
+++ b/deal.II/lac/include/lac/sparse_decomposition.h
@@ -137,8 +137,7 @@ template <typename number>
 class SparseLUDecomposition : protected SparseMatrix<number>, 
                               public virtual Subscriptor
 {
-  public:
-
+  protected:
                                     /**
                                      * Constructor. Does nothing.
                                      *
@@ -157,6 +156,7 @@ class SparseLUDecomposition : protected SparseMatrix<number>,
                                      */
     SparseLUDecomposition (const SparsityPattern& sparsity);
 
+  public:
                                      /**
                                       * Destruction. Mark the
                                       * destructor pure to ensure that