boundingBox has mag() and span() methods - use them

...ons/utilities/mesh/generation/blockMesh/createMergeList.C

...tions/utilities/mesh/generation/extrudeMesh/extrudeMesh.C

...s/utilities/mesh/generation/snappyHexMesh/snappyHexMesh.C

...ons/utilities/mesh/manipulation/checkMesh/checkGeometry.C

...arallelProcessing/reconstructParMesh/reconstructParMesh.C

...allelProcessing/redistributeMeshPar/redistributeMeshPar.C

applications/utilities/surface/surfaceCheck/surfaceCheck.C

...cations/utilities/surface/surfaceToPatch/surfaceToPatch.C

src/OpenFOAM/meshes/boundBox/boundBox.H

src/OpenFOAM/meshes/polyMesh/globalMeshData/globalMeshData.C

...utoMesh/autoHexMesh/autoHexMeshDriver/autoHexMeshDriver.C

src/autoMesh/autoHexMesh/shellSurfaces/shellSurfaces.C

src/dynamicMesh/polyTopoChange/polyTopoChange/hexRef8.C

...placement/SBRStress/displacementSBRStressFvMotionSolver.C

...t/interpolation/displacementInterpolationFvMotionSolver.C

...placement/laplacian/displacementLaplacianFvMotionSolver.C

...splacement/surfaceSlipDisplacementPointPatchVectorField.C

...irectMapped/directMappedPolyPatch/directMappedPolyPatch.C

src/meshTools/indexedOctree/treeDataTriSurface.C

src/meshTools/meshSearch/meshSearch.C