[staggeredGrid][test] Use correct function in Donea test

test/freeflow/staggered/doneatestproblem.hh

@@ -353,7 +353,7 @@ public:
                 // treat cell-center dofs
                 const auto dofIdxCellCenter = scv.dofIndex();
                 const auto& posCellCenter = scv.dofPosition();
-                const auto analyticalSolutionCellCenter = dirichletAtPos(posCellCenter)[cellCenterIdx];
+                const auto analyticalSolutionCellCenter = analyticalSolution(posCellCenter)[cellCenterIdx];
                 const auto numericalSolutionCellCenter = this->model().curSol()[cellCenterIdx][dofIdxCellCenter];
                 sumError[cellCenterIdx] += squaredDiff_(analyticalSolutionCellCenter, numericalSolutionCellCenter) * scv.volume();
                 sumReference[cellCenterIdx] += analyticalSolutionCellCenter * analyticalSolutionCellCenter * scv.volume();
@@ -364,7 +364,7 @@ public:
                 {
                     const int dofIdxFace = scvf.dofIndex();
                     const int dirIdx = scvf.directionIndex();
-                    const auto analyticalSolutionFace = dirichletAtPos(scvf.center())[faceIdx][dirIdx];
+                    const auto analyticalSolutionFace = analyticalSolution(scvf.center())[faceIdx][dirIdx];
                     const auto numericalSolutionFace = this->model().curSol()[faceIdx][dofIdxFace][momentumBalanceIdx];
                     directionIndex[dofIdxFace] = dirIdx;
                     errorVelocity[dofIdxFace] = squaredDiff_(analyticalSolutionFace, numericalSolutionFace);