Fix step-20 compilation.

76874a2160 did not correctly name a field of a class.

diff --git a/examples/step-20/step-20.cc b/examples/step-20/step-20.cc
index 0c8cfc16df41e9821c2a50e6e235b3e8e0a12a56..fb1be4ff9567a60f7bf58e19fc62107b91236dad 100644 (file)
--- a/examples/step-20/step-20.cc
+++ b/examples/step-20/step-20.cc
@@ -651,7 +651,7 @@ namespace Step20
                      const InverseMatrix<SparseMatrix<double> > &Minv)
     :
     system_matrix (&A),
-    inverse_mass (&Minv),
+    m_inverse (&Minv),
     tmp1 (A.block(0,0).m()),
     tmp2 (A.block(0,0).m())
   {}