calculateMeshToMesh0Addressing: Change decomposition method to CELL_TETS

Resolves additional request in http://www.openfoam.org/mantisbt/view.php?id=1544

src/sampling/meshToMesh0/calculateMeshToMesh0Addressing.C

@@ -102,7 +102,7 @@ void Foam::meshToMesh0::calcAddressing()
 
     indexedOctree<treeDataCell> oc
     (
-        treeDataCell(false, fromMesh_, polyMesh::FACE_DIAG_TRIS),
+        treeDataCell(false, fromMesh_, polyMesh::CELL_TETS),
         shiftedBb,      // overall bounding box
         8,              // maxLevel
         10,             // leafsize