Fix compilation with some matrix free tests.

This fixes a compilation error with GCC 4.8:

error: no match for ‘operator=’
(operand types are ‘boost::shared_ptr<dealii::Table<2, dealii::VectorizedArray<double> > >’ and ‘long int’)

      scalar_coefficient = NULL;
                         ^

diff --git a/include/deal.II/matrix_free/operators.h b/include/deal.II/matrix_free/operators.h
index ffd9b83e82149fa711eed234bf1610567ef93a45..98990d4fa06a890f19340a62e0e785b0f38a31ba 100644 (file)
--- a/include/deal.II/matrix_free/operators.h
+++ b/include/deal.II/matrix_free/operators.h
@@ -1008,7 +1008,7 @@ namespace MatrixFreeOperators
   clear ()
   {
     Base<dim, Number>::clear();
-    scalar_coefficient = NULL;
+    scalar_coefficient.reset();
   }