[matrixtest.cc] Enable test for 1x1 FieldMatrices.

Found by clang 6 -Wunused-variable. No idea why the FieldMatrix is tested in ISTL, but whatever.

[matrixtest.cc] Enable test for 1x1 FieldMatrices.
10e72ef5 · Jö Fahlke · 9da2de98 · 10e72ef5
Commit 10e72ef5 authored 6 years ago by Jö Fahlke
--- a/dune/istl/test/matrixtest.cc
+++ b/dune/istl/test/matrixtest.cc
@@ -533,7 +533,7 @@ int main()
  FieldVector<double,1> fvX1;
  FieldVector<double,1> fvY1;

-  testMatrix(fMatrix, fvX, fvY);
+  testMatrix(fMatrix1x1, fvX1, fvY1);

  // ////////////////////////////////////////////////////////////////////////
  //   Test the DiagonalMatrix class